DSL to describe, document and test web services

Rails for API only applications

Basic template for modular Sinatra app

Sample framework for basic authentication in Sinatra with DataMapper

Socialize your app with Likes, Follows and Mentions

Rack middleware and application for serving dynamic pages in very simple way.

Sinatra-based CMS

Catches mail and serves it through a dream.

The express way to send mail from Ruby.

A sinatra extension wrapped in a gem that implements authentication/permissions with users stored in the database. Now with optional support for facebook connect