fake_arel will simulate rails 3 arel syntax for Rails 2.

file upload and rmagick image resizing

Easily fetch product information from third party websites such as Amazon, Steam, eBay, etc.

foursquare-api is a Ruby wrapper for the new Foursqauare V2 API

Comparing apples with apples

For those that use Kanban or Scrum and want to print their cards so they can stick em on the wall

Caches retrieved information to your user profile and reuses it when you query again.

Code presentation tool using git

A Ruby library for limiting the number of times a method can be invoked within a specified time period.

Provide `notice` method to user model to save notices and to shows them later in views with Gritter (growl-like jQuery plugin). Fully support of Rails flash messages also. Helpful to send flash messages from background jobs.

A simple way to grab recent activity on a given model grouped by hour, day, week or month (time series). Supports "padding" for intervals without activity.

Simple Heatmap generator in Ruby. (Requires ImageMagick)

A image processing proxy server, written in Ruby as a Rack application. Requires ImageMagick.

An edit-in-place gem that uses the JEditable jQuery plugin to post updates to the server via AJAX.

A test framework using watir-webdriver rspec and page-object

Mastercoin wallet using QT bindings to create a useful gui wallet

An elasticsearch wrapper for mongoid odm based on slingshot. Makes integration between ElasticSearch full-text search engine and Mongoid documents seemless and simple.

A sinatra memcached-manager that allows you to view status, flush/view keys and so on. Also easily pluggable to a Rails app.

Mirage aids testing of your applications by hosting mock responses so that your applications do not have to talk to real endpoints. Its accessible via HTTP and has a RESTful interface.

Beautiful logging for Mongoid