Best Free UI Design Software

Sciter brings a stack of web technologies to desktop UI development. Web designers, and developers, can reuse their experience and expertise in creating modern-looking desktop applications. Various GUI frameworks offer different UI declaration and styling languages, such as QML and XAML (Microsoft WPF). On the contrary, Sciter allows the use of time-proven, robust, and flexible HTML and CSS for GUI definition and GPU-accelerated rendering. In almost 10 years, the Sciter UI engine has become the secret weapon of success for some of the most prominent antivirus products on the market, Norton Antivirus and Internet Security, Comodo Internet Security, ESET Antivirus, BitDefender Antivirus, and others. The use of HTML/CSS has allowed their UI to stay in touch with modern GUI trends throughout all these years and will continue to well into the future. Sciter Engine is a single, compact DLL of 5+ Mb in size.

LVGL is the most popular free and open source embedded graphics library to create beautiful UIs for any MCU, MPU, and display type. Use SquareLine Studio, our drag-and-drop UI editor, to simplify the development. 30+ built-in widgets, 100+ style properties, web-inspired layout managers, and a typography system supporting many languages. LVGL is fully open source and has no external dependencies which makes its porting incredibly simple. It works with any modern MCU or MPU and can be used with any (RT)OS or bare metal setup to drive ePaper, monochrome, OLED, or TFT displays, and even monitors. Besides, it's free even for commercial projects. SquareLine Studio is an easy-to-use drag-and-drop UI editor tool for LVGL where even designers can create fully functional UIs. Just like LVGL, SquareLine Studio is also fully vendor-agnostic. We have a great network of people and companies who can help you design and develop your UIs, implement drivers, or the whole application.

Next-generation UI editor for individuals and professionals to design and develop beautiful UIs for your embedded devices quickly and easily. Exports platform-independent C or MicroPython code for LVGL which can be compiled for any vendor's device. Just click the play button to try out the UI instantly without rebuilding it in a pixel-perfect preview. Create custom components from the built-in widgets using styles, animations, and events. SquareLine Studio exports plain C or MicroPython code so you can use it on any platform. IoT, smart home and home automation, wearable instruments, automotive, medical devices, and many more. Even for 4K displays in kiosk devices or multi-platform desktop applications. Unlike in other prototyping tools, in SquareLine Studio you can build the UI from fully functional components. SquareLine Studio offers flexible licenses for all use cases, including personal use, startups, and large companies as well.