Flexible authentication solution for Rails with Warden.

An opinionated framework for creating REST-like APIs in Ruby.

The administration framework for Ruby on Rails applications.

Classier solution for file uploads for Rails, Sinatra and other Ruby web frameworks

Complete Ruby geocoding solution.

A Rails form builder plugin with semantically rich and accessible markup.

Wraith — A responsive screenshot comparison tool

A methodology for documenting CSS and generating styleguides.

A CSS redundancy analyzer that analyzes redundancy.

Magical authentication for Rails 3 & 4

A markdown based documentation system for style guides.

Ruby/Git is a Ruby library that can be used to create, read and manipulate Git repositories by wrapping system calls to the git binary.

Official Geokit plugin for Rails/ActiveRecord. Provides location-based goodness for your Rails app. Requires the Geokit gem.

The official gem for the Instagram API

Industrial Strength Asset Packaging for Rails

The facebooker Rails plugin

ActiveShipping is a simple shipping abstraction library extracted from Shopify

A simple way to serve up appropriate images for every visitor.

jRails is a drop-in jQuery replacement for Prototype/script.aculo.us on Rails. Using jRails, you can get all of the same default Rails helpers for javascript functionality using the lighter jQuery …

Ruby Google Chart API

Ruby/CLI: Automatic lossless reduction of all your images

A gem to automate using jQuery with Rails 3

Dino is a ruby gem that helps you bootstrap prototyping with an Arduino

MJML + ERb/Haml/Slim view template

A Ruby DSL for structured web crawling, with a robust caching system.

Ruby Minecraft Plugin support on top of bukkit

anatomyofbackbone

Rack Middleware adhering to the Google Ajax Crawling Scheme, using a headless browser to render JS heavy pages and serve a dom snapshot of the rendered state to a requesting search engine.