Ruby on Rails
Simple Python version management
Proxy between your code and an object. Useful for working with asynchronously loaded objects, such as Facebook's API.
pushState + ajax = pjax
Compile and install Ruby
Groom your app’s Ruby environment
Distributed testing framework for RSpec
Cookbook for installing pyenv to manage multiple Python versions
An improved Logger replacement that logs to syslog. It is almost drop-in with a few caveats.
An ActiveRecord database adapter that allows you to setup a "master/slave" environment
Solr-powered search for Ruby objects
Open-source actions for the Causes.com platform
Hackathon - Causes Open Actions
A script to monitor cassandra
Simple starting template for slideshow presentations built using reveal.js, highlight.js and HTML
Cloudinary GEM for Ruby on Rails integration
Twigg provides stats for activity in Git repositories
New Relic RPM Ruby Agent
A Ruby wrapper for the Google Analytics API
Decorators/View-Models for Rails Applications
The official jQuery user interface library.
Preflight for HTML email
Waypoints is a jQuery plugin that makes it easy to execute a function whenever you scroll to an element.
ActiveRecord (>=3.0) plugin which allows you to hide and restore records without actually deleting them.
Tool for adding simple AJAX functionality to a site
Rails wrapper for the premailer gem