Best Free Application Development Software

New Relic

New Relic empowers enterprise application developers with a comprehensive, data-driven approach to planning, building, deploying, and running software. Our unified data platform consolidates all telemetry data, offering robust full-stack analysis tools that provide deep insights into every stage of the development lifecycle. Designed for large-scale operations, New Relic helps identify and resolve issues swiftly, ensuring optimal performance and enhancing reliability. Streamline workflows and uncover the underlying causes of problems, enabling continuous improvement and innovation. With New Relic, deliver exceptional customer experiences, accelerate development cycles, and drive growth with unmatched capabilities tailored for enterprise application development.

2,572 Ratings

Starting Price: Free

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Cody

Sourcegraph

Cody, Sourcegraph’s AI code assistant goes beyond individual dev productivity, helping enterprises achieve consistency and quality at scale with AI. Unlike traditional coding assistants, Cody understands the entire codebase, enabling deeper contextual awareness for smarter autocompletions, refactoring, and AI-driven code suggestions. It integrates with IDEs like VS Code, Visual Studio, Eclipse, and JetBrains, providing inline editing and chat without disrupting workflows. Cody also connects with tools like Notion, Linear, and Prometheus to enhance development context. Powered by advanced LLMs like Claude Sonnet 4 and GPT-4o, it optimizes speed and performance based on enterprise needs, and is always adding the latest AI models. Developers report significant efficiency gains, with some saving up to six hours per week and doubling their coding speed.

86 Ratings

Starting Price: $0

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Pdftools

PDF Tools

Whether you have thousands of documents or millions, Pdftools has the products and services to help make processing a breeze. Designed for document-heavy industries, Pdftools’ suite of SDKs and APIs are here to make your document workflows easier, faster, and stress-free. Built on SDKs and APIs, the Pdftools products integrate seamlessly into your existing (or new) systems and applications. Process thousands of documents every minute. Our tools are precision-engineered to be efficient and run at blazing speeds. We’re engineers at heart, so we’re only satisfied with the most reliable, orderly, and usable, and well-documented platforms. Shrink file sizes down, but keep the quality and interactivity. Your documents will always be compliant for long-term archiving. We’ve obsessed over every detail in our products, and documented everything so it’s easy to get started.

13 Ratings

Starting Price: $0/month/user

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pdfRest

Datalogics Inc.

pdfRest API Toolkit was made by developers, for developers. Rapidly integrate PDF workflows with any business application, simply and seamlessly. pdfRest API Toolkit includes all of the PDF processing tools you'll need, to make your job easy. PDF to Word, PDF to Excel, PDF to PowerPoint, Add to PDF, Query PDF, Extract Text, Convert to PDF, PDF to Images, Convert to PDF/A, Convert to PDF/X, Compress PDF, Linearize PDF, Flatten Forms, Flatten Transparencies, Flatten Annotations, Flatten Layers, Merge PDFs, Split PDF, Encrypt PDF, Decrypt PDF, Restrict PDF, Watermark PDF, Import Form Data, Export Form Data, Convert PDF Colors, OCR PDF, API Polling, Upload Files, Zip Files. Get up and running fast with the pdfRest Postman Collection or start from functional sample code in .NET, JavaScript, Python, PHP, and cURL from the pdfRest GitHub repository. Gold-standard processing powered by Adobe® PDF Library™ ensures the highest quality results. Free to get started with no commitment.

35 Ratings

Starting Price: $0 per month

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Sematext Cloud

Sematext Group

Sematext Cloud is an innovative, unified platform with all-in-one solution for infrastructure monitoring, application performance monitoring, log management, real user monitoring, and synthetic monitoring to provide unified, real-time observability of your entire technology stack. It's used by organizations of all sizes and across a wide range of industries, with the goal of driving collaboration between engineering and business teams, reducing the time of root-cause analysis, understanding user behaviour and tracking key business metrics. The main capabilities range from log monitoring to APM, server monitoring, database monitoring, network monitoring, uptime monitoring, website monitoring or container monitoring Find complete details on our website. Or better: start a free demo, no email address required.

62 Ratings

Starting Price: $0

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Qodo

Qodo (formerly Codium) analyzes your code and generates meaningful tests to catch bugs before you ship. Qodo maps your code’s behaviors, surfaces edge cases, and tags anything that looks suspicious. Then, it generates clear and meaningful unit tests that match how your code behaves. Get full visibility of how your code behaves, and how the changes you make affect the rest of your code. Code coverage is broken. Meaningful tests actually check functionality, giving you the confidence needed to commit. Spend fewer hours writing questionable test cases, and more time developing useful features for your users. By analyzing your code, docstring, and comments, Qodo suggests tests as you type. All you have to do is add them to your suite. Qodo is focused on code integrity: generating tests that help you understand how your code behaves; finding edge cases and suspicious behaviors; and making your code more robust.

13 Ratings

Starting Price: $19/user/month

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Debricked

Debricked's tool enables for increased use of Open Source while keeping associated risks at bay, making it possible to keep a high development speed while still staying secure. The service runs on state of the art machine learning, allowing the data quality to be outstanding as well as instantly updated. High precision (over 90% in supported languages) in combination with flawless UX and scalable automation features makes Debricked one of a kind and the way to go for open source management. Recently, debricked released their new platform by the name of Open Source Select where open source projects can be compared, evaluated and monitored to ensure high quality and community health.

2 Ratings

Starting Price: Free

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Gemini Code Assist

Google

Increase software development and delivery velocity using generative AI assistance, with enterprise security and privacy protection. Gemini Code Assist completes your code as you write, and generates whole code blocks or functions on demand. Code assistance is available in many popular IDEs, such as Visual Studio Code, JetBrains IDEs (IntelliJ, PyCharm, GoLand, WebStorm, and more), Cloud Workstations, Cloud Shell Editor, and supports 20+ programming languages, including Java, JavaScript, Python, C, C++, Go, PHP, and SQL. Through a natural language chat interface, you can quickly chat with Gemini Code Assist to get answers to your coding questions, or receive guidance on coding best practices. Chat is available in all supported IDEs. Enterprises can customize Gemini Code Assist using their organization’s private codebases and knowledge sources so that Gemini Code Assist can offer more tailored assistance. Gemini Code Assist enables large-scale changes to entire codebases.

1 Rating

Starting Price: Free

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Bright Data

Bright Data is the world's #1 web data, proxies, & data scraping solutions platform. Fortune 500 companies, academic institutions and small businesses all rely on Bright Data's products, network and solutions to retrieve crucial public web data in the most efficient, reliable and flexible manner, so they can research, monitor, analyze data and make better informed decisions. Bright Data is used worldwide by 20,000+ customers in nearly every industry. Its products range from no-code data solutions utilized by business owners, to a robust proxy and scraping infrastructure used by developers and IT professionals. Bright Data products stand out because they provide a cost-effective way to perform fast and stable public web data collection at scale, effortless conversion of unstructured data into structured data and superior customer experience, while being fully transparent and compliant.

1 Rating

Starting Price: $0.066/GB

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CodePen

CodePen is a social development environment for front-end designers and developers. Build and deploy a website, show off your work, build test cases to learn and debug, and find inspiration. Find inspiration from 1.8 million+ front-end designers and developers. Browse and share work from world-class designers and developers in the front-end community. The CodePen Editor is highly customizable. There is autocomplete and Emmet for speed and accuracy. Plus you can set up smart defaults for starting new work. Completely customize the look of code demos on your own site. Change the look of your site? Just change the theme and all your Embedded Pens change too. Need to use an image in a Pen? No more awkwardly finding alternate hosting for it, you can drag-and-drop it right onto CodePen and we'll host it for you. And not just images! CSS, JSON files, SVGs, media files, whatever! Projects is the most powerful feature of CodePen.

1 Rating

Starting Price: $8 per month

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Cohere

Cohere AI

Cohere is an enterprise AI platform that enables developers and businesses to build powerful language-based applications. Specializing in large language models (LLMs), Cohere provides solutions for text generation, summarization, and semantic search. Their model offerings include the Command family for high-performance language tasks and Aya Expanse for multilingual applications across 23 languages. Focused on security and customization, Cohere allows flexible deployment across major cloud providers, private cloud environments, or on-premises setups to meet diverse enterprise needs. The company collaborates with industry leaders like Oracle and Salesforce to integrate generative AI into business applications, improving automation and customer engagement. Additionally, Cohere For AI, their research lab, advances machine learning through open-source projects and a global research community.

1 Rating

Starting Price: Free

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Steel.dev

Steel is an open source browser API that lets you control fleets of browsers in the cloud. From large-scale scrape jobs to fully autonomous web agents, Steel makes it easy to run browser automation in the cloud. Spin up on-demand browser sessions with a simple API call. Built-in CAPTCHA solving that keeps your automation flowing. Simple controls to never worry about getting flagged as a bot again. The average session starts in less than 1s when the client is in the same region. Run for a minute or several hours, each session can run up to 24 hours. Save and inject cookies and local storage to pick up where you left off. Easily run your Puppeteer, Playwright, or Selenium in the cloud. Session Viewer lets you view and debug live or recorded sessions.

1 Rating

Starting Price: $99 per month

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PlatformIO

Professional collaborative platform for embedded development. PlatformIO is a next-generation, collaborative platform for embedded development that enables customers to save resources and time by vastly reducing the expenses and labor associated with creating and maintaining product software. We believe the embedded systems industry desperately needs reinvention. Not only are the IDEs and tools built with technology from the 1990s, but they involve many complex requirements and platform-dependent configurations that turn away talented developers from becoming embedded engineers. The most loved IDE solution for Microsoft Visual Studio Code. A user-friendly and extensible integrated development environment with a set of professional development instruments, providing modern and powerful features to speed up yet simplify the creation and delivery of embedded products. PlatformIO is written in pure Python and doesn't depend on any additional libraries/tools from an operation system.

1 Rating

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Code Search

Sourcegraph

With rapidly growing codebases, a proliferating number of repositories, multiple languages and file formats, and an increasing number of developer tools, Sourcegraph's Code Search enables developers to quickly explore and understand their code with precision and accuracy and automate large-scale code changes.

Starting Price: $49/user/month

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YAG-Suite

YAGAAN

The YAG-Suite is a French made innovative tool which brings SAST one step beyond. Based on static analysis and machine learning, YAGAAN offers customers more than a source code scanner : it offers a smart suite of tools to support application security audits as well as security and privacy by design DevSecOps processes. Beyond classic vulnerability detection, the YAG-Suite focuses the team attention on the problems that really matter in their business context, it supports developers in their understanding of the vulnerability causes and impacts. Its contextual remediation support them in fixing efficiently the problems while improving their secure coding skills. Additionally, YAG-Suite's unprecedented 'code mining' support security investigations of an unknown application with mapping all relevant code features and security mechanisms and offers querying capabilities to search for 0-days or non automatically detectable risks. PHP, Java and Python are supported. JS, C/C++ coming soon

Starting Price: From €500/token or €150/mo

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Contrast Security

Modern software development must match the speed of the business. But the modern AppSec tool soup lacks integration and creates complexity that slows software development life cycles. Contrast simplifies the complexity that impedes today’s development teams. Legacy AppSec employs a one-size-fits-all vulnerability detection and remediation approach that is inefficient and costly. Contrast automatically applies the best analysis and remediation technique, dramatically improving efficiencies and efficacy. Separate AppSec tools create silos that obfuscate the gathering of actionable intelligence across the application attack surface. Contrast delivers centralized observability that is critical to managing risks and capitalizing on operational efﬁciencies, both for security and development teams. Contrast Scan is pipeline native and delivers the speed, accuracy, and integration demanded by modern software development.

Starting Price: $0

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Descope

Descope is a drag-and-drop customer authentication and identity management platform. Our no / low code CIAM solution enables developers to easily create and customize their entire user journey using visual workflows – from authentication and authorization to MFA and federation. Descope also provides a connectors ecosystem with dozens of third-party services for use cases such as identity verification, fraud prevention, risk-based authentication, and identity orchestration. Descope is built on a scalable multi-tenant architecture with high availability that can support advanced enterprise requirements. Customers use Descope to improve their user onboarding with passwordless authentication, enhance security with MFA and step-up controls, and unify customer identities across business properties. Founded in 2022, Descope is backed by Lightspeed and GGV and is a member of the FIDO Alliance.

Starting Price: $0.05 per user per month

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Codecov

Develop healthier code. Improve your code review workflow and quality. Codecov provides highly integrated tools to group, merge, archive, and compare coverage reports. Free for open source. Plans starting at $10/user per month. Ruby, Python, C++, Javascript, and more. Plug and play into any CI product and workflow. No setup required. Automatic report merging for all CI and languages into a single report. Get custom statuses on any group of coverage metrics. Review coverage reports by project, folder and type test (unit tests vs integration tests). Detailed report commented directly into your pull request. Codecov is SOC 2 Type II certified, which means a third-party audits and attests to our practices to secure our systems and your data.

Starting Price: $10 per user per month

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CodeSandbox

CodeSandbox is a cloud development platform that empowers development teams to code, collaborate, and ship projects of any size from any device in record time. Run your code in powerful microVMs and build anything without limits. We configure your environment for you and keep your code always ready, behind a URL. Boxy, the CodeSandbox AI coding assistant, is also now available to all Pro subscribers.

Starting Price: $12 per month

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Boost Note

Boost Note is a powerful, lightspeed collaborative workspace for developer teams. Built to empower developers productivity with the most solid note taking experience for developers. Not just a GitHub flavored markdown. Put diagrams with Charts.js, Mermaid, and PlantUML in documents to maximize visibility. Choose from keymaps like Vim, over 150 themes, and more to create your own Markdown editor. Manage your documents programmatically. Grab an authentication token and access Boost Note's APIs via simple HTTP requests. Automate your documentation work with over 2,000 external tool integrations via Zapier. Collaborate with your colleagues and share information your way. Have all your teams in one shared workspace. Write documents as a team with Boost Note's realtime editing. Check revision history of a doc. You can easily roll back to one of the previous versions in one click. Keep your important data safe through granula access control based on workspace.

Starting Price: $3 per member per month

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JetBrains Datalore

JetBrains

Datalore is a collaborative data science and analytics platform aimed at boosting the whole analytics workflow and making work with data enjoyable for both data scientists and data savvy business teams across the enterprise. Keeping a major focus on data teams workflow, Datalore offers technical-savvy business users the ability to work together with data teams, using no-code or low-code together with the power of Jupyter notebooks. Datalore enables analytical self-service for business users, enabling them to work with data using SQL and no-code cells, build reports and deep dive into data. It offloads the core data team with simple tasks. Datalore enables analysts and data scientists to share results with ML Engineers. You can run your code on powerful CPUs or GPUs and collaborate with your colleagues in real-time.

Starting Price: $19.90 per month

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Sumocode

Sumo Apps

Create apps and games with just a few lines of code. Learn how to code with gamified examples. Remix example of sample code or write something new from scratch. Inspired by examples, using JavaScript as a language you'll discover how easy it is to program and create games with few lines of code. Boost your creativity with Sumocode, and let your mind build new things! Update your skills and learn how to code like a pro! There's no holding back your imagination! Learn to apply engineering concepts to create digital solutions to problems at hand! It doesn't matter if you're 5, 55, or 105, you can learn to code! Sumocode is here to help you navigate the first steps on your journey to becoming a programmer. It is easier than you think. Learn to build apps and code snippets. It is surprisingly easy with our Sumo3D code library. You can use our examples as the base or create your own apps from scratch.

Starting Price: $9 per month

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zope.interface

Python Software Foundation

This package is intended to be independently reusable in any Python project. It is maintained by the Zope Toolkit project. This package provides an implementation of “object interfaces” for Python. Interfaces are a mechanism for labeling objects as conforming to a given API or contract. So, this package can be considered as an implementation of the Design By Contract methodology support in Python. Interfaces are objects that specify (document) the external behavior of objects that “provide” them. An interface specifies behavior through informal documentation in a doc string, attribute definitions, and invariants, which are conditions that must hold for objects that provide the interface. Attribute definitions specify specific attributes. They define the attribute name and provide documentation and constraints of attribute values. Attribute definitions can take a number of forms.

Starting Price: Free

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RapidFort

Automatically eliminate unused software components and deploy smaller, faster, more secure workloads. RapidFort drastically reduces vulnerability and patch management queues so that developers can focus on building. By eliminating unused container components, RapidFort enhances production workload security and saves developers from unnecessarily patching and maintaining unused code. RapidFort profiles containers to understand what components are needed to run. Run your containers as normal in any environment, dev, test, or prod. Use any container deployment, including Kubernetes, Docker Compose, Amazon EKS, and AWS Fargate. RapidFort then identifies which packages you must keep, enabling you to remove unused packages. Typical improvements are in the 60% to 90% range. RapidFort also provides the option to build and customize remediation profiles, allowing you to pick and choose what to retain or remove.

Starting Price: $5,000 per month

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Zebedee

From high-stakes esports tournaments to casual mobile games, our world is open to everyone. Bitcoin is programmable money. We make it a seamless part of the game experience. If you can scan a QR code, you can earn with Zebedee. Straightforward, instant, and available now. Play our games or play with our APIs. Either way, you'll soon discover why Bitcoin is transforming the world of gaming. Open a new acquisition channel and revenue stream in the quickly growing world of Bitcoin gaming. Gain an edge over your competition by offering cutting-edge Bitcoin Lightning services and a gateway into the exploding world of Bitcoin gaming. Play a single intense match with live Bitcoin transfers and earn a share of the prize pot based on your percentage of the total score. In survival mode, your sats are your life. When you score, you get an extra life. When you die, you lose some life. If you run out of seats, you get kicked from the match.

Starting Price: Free

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Superblocks

Superblocks is a programmable IDE for developers to build any internal app, workflow, or scheduled job at a fraction of the time and cost. Ship next month's roadmap this week. Quickly build apps, workflows & jobs connected to your data. Secure with granular permissions (RBAC), SSO, audit logs, and secret management in seconds. Deploy with Git and monitor production. Extend anything with code. No need to learn React, HTML, or CSS. Drag and drop components, connect them to data and make your app dynamic by triggering APIs. Build custom KYC, Compliance, AML, and credit approval tools to enable robust support processes to increase the velocity of your support team. Stop wrestling with CLIs. Quickly build admin panels for your datastores to read, write, and update your customer data with tables, forms, and charts. Clark is an AI-powered app builder that helps teams quickly create secure internal enterprise applications using their own design systems, permissions, and integrations.

Starting Price: $0 per month

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Quix

Building real-time apps and services require lots of components running in concert: Kafka, VPC hosting, infrastructure as code, container orchestration, observability, CI/CD, persistent volumes, databases, and much more. The Quix platform takes care of all the moving parts. You just connect your data and start building. That’s it. No provisioning clusters or configuring resources. Use Quix connectors to ingest transaction messages streamed from your financial processing systems in a virtual private cloud or on-premise data center. All data in transit is encrypted end-to-end and compressed with G-Zip and Protobuf for security and efficiency. Detect fraudulent patterns with machine learning models or rule-based algorithms. Create fraud warning messages as troubleshooting tickets or display them in support dashboards.

Starting Price: $50 per month

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Akto

Akto is an open source API security in CI/CD platform. Key features of Akto include: 1. API Discovery 2. API Security Testing 3. Sensitive Data Exposure 4. API Security Posture Management 5. Authentication and Authorization 6. API Security in DevSecOps Akto helps developers and security teams secure APIs in their CI/CD by continuously discovering and testing APIs for vulnerabilities. Akto's pricing is transparent on website. Free tier is available. You can deploy both self-hosted and in cloud. It takes only few mins to deploy and see results. Akto can integrate with multiple traffic sources - Burpsuite, AWS, postman, GCP, gateways, etc.

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Vega-Altair

The Vega-Altair open-source project is not affiliated with Altair Engineering, Inc. With Vega-Altair, you can spend more time understanding your data and its meaning. Altair’s API is simple, friendly and consistent and built on top of the powerful Vega-Lite visualization grammar. This elegant simplicity produces beautiful and effective visualizations with a minimal amount of code. The key idea is that you are declaring links between data columns and visual encoding channels, such as the x-axis, y-axis, color, etc. The rest of the plot details are handled automatically. Building on this declarative plotting idea, a surprising range of simple to sophisticated plots and visualizations can be created using relatively concise grammar.

Starting Price: Free

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DevCycle

DevCycle is the leading feature management platform that combines the benefits of OpenFeature and continuous delivery. Open Source Flexibility + SaaS Simplicity: DevCycle is the only platform where OpenFeature is built-in to its SDKs and fully committed to the open standards community with open source SDKs and APIs. This flexibility is combined with DevCycle’s edge architecture and local bucketing to provide teams high scalability and low latency partnered with enterprise-level security and compliance guarantees. Total Observability Into Your Feature Flags: Teams have complete visibility into all their features across their organization. DevCycle observability integrations help track, monitor and diagnose feature flag usage while developer integrations and tooling give full control and visibility into feature flags within code. Customized Release Strategies: Teams can choose their preferred feature release strategies with advanced tools for gradual and percentage based rollout

Starting Price: 0

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Best Free Application Development Software

Compare the Top Free Application Development Software as of June 2025

What is Free Application Development Software?

New Relic

Cody

Pdftools

pdfRest

Sematext Cloud

Qodo

Debricked

Gemini Code Assist

Bright Data

CodePen

Cohere

Steel.dev

PlatformIO

Code Search

YAG-Suite

Contrast Security

Descope

Codecov

CodeSandbox

Boost Note

JetBrains Datalore

Sumocode

zope.interface

RapidFort

Zebedee

Superblocks

Quix

Akto

Vega-Altair

DevCycle

Best Free Application Development Software

Compare the Top Free Application Development Software as of June 2025

What is Free Application Development Software?

New Relic

Cody

Pdftools

pdfRest

Sematext Cloud

Qodo

Debricked

Gemini Code Assist

Bright Data

CodePen

Cohere

Steel.dev

PlatformIO

Code Search

YAG-Suite

Contrast Security

Descope

Codecov

CodeSandbox

Boost Note

JetBrains Datalore

Sumocode

zope.interface

RapidFort

Zebedee

Superblocks

Quix

Akto

Vega-Altair

DevCycle

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