Active Merchant is a simple payment abstraction library used in and sponsored by Shopify. It is written by Tobias Luetke, Cody Fauser, and contributors. 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.
A capybara driver for PhantomJS
guiding you through setting up an osx machine for open source ruby work
Rails 3 port of laserlemon's venerable vestal_versions.
An opinionated appointment scheduling app built in 24 hours during MyGOSSCON 2009.