A sinatra extension wrapped in a gem that implements authentication/permissions with users stored in the database. Now with optional support for facebook connect
A very small and simple TSA (Timestamping Authority) for development environments
Implementation of the Trello API for Ruby
A ruby web server built for concurrency
MARY TTS -- an open-source, multilingual text-to-speech synthesis system written in pure java
RGhost is a document creation and conversion API. It uses the Ghostscript framework for the format conversion, utilizes EPS templates and is optimized to work with larger documents. Support(PDF,PS,GIF,TIF,PNG,JPG,etc)
Facebook-style lightbox, built in jQuery
An standalone Mongo Browser for Ruby, using HTML5. Just run and forget.
RGhost Barcode is adapter from Barcode Writer. The Barcode Writer in Pure Postscript is an award-winning open source barcode maker, as used by NASA.