Buildroot with added rubyness

Server for mobile applications that talk in JSON.

Taking all the pain away from managing Tracking Pixels

Reports exceptions to Hoptoad

Skeleton Facebook canvas application using FbGraph

The bbcode gem that does what you need.

Ruby date formatting in javascript

Brains of our android robot :)

Custom android kernel with USB Host functionality and a driver for the Velleman K8055 USB Experiment board

A lightweight math expression evaluator

A simple but powerful lexical analyser for Ruby

i knew ruby was uber productive, so I thought I'd see how long it would take to write a small, simple assembly like language and interpreter... 20 mins to get it working, 20 mins tidying it up, 10 mins writing a trivial sample...