Zen is a modular CMS written using Ramaze. Zen gives you complete freedom to build whatever you want in whatever way you might want to build it.

Zero configuration authentication starter for Rails.

An (almost) pure-ruby Zip library

web-based presentation tool

Translate YCP-like library calls (Ops.*, Builtins.*) to idiomatic Ruby

This gem allows to easily access facebook's ads api in ruby. See https://developers.facebook.com/docs/reference/ads-api/