Jekyll is a blog-aware, static site generator in Ruby
Classy web-development dressed in a DSL (official / canonical repo)
The Mongo Database
Qt bindings for Node.js
A text processing library that does auto linking and extraction of usernames, lists and hashtags in tweets
a restful java framework based on spring,
RVC is a Linux console UI for vSphere, built on the RbVmomi bindings to the vSphere API.
Ruby process monitor