Active Merchant is a simple payment abstraction library extracted from Shopify. The aim of the project is to feel natural to Ruby users and to abstract as many parts as possible away from the user to offer a consistent interface across all supported gateways.
Safe Ruby Enum implementation
Convert Ruby hashes into static Ruby objects.
Blog of Mezuka developers' experience
Ruby gem containing easily installable access to wkhtmltopdf application
Add support for Watir (http://github.com/watir/watir) in Rails.
A ruby web server built for concurrency
Oauth2 strategy for Google
CLI gem for comfortably working with icon fonts (open, download, convert) from http://fontello.com for usage in Rails apps.
Compass plugin to generate retina ready sprites
compass rails integration
The de-facto solution to flexible routing with nested views in AngularJS