Jekyll is a blog-aware, static site generator in Ruby
Jekyll • Simple, blog-aware, static sites
discourse - A platform for community discussion. Free, open, simple. Discourse
devise - Flexible authentication solution for Rails with Warden. Devise « Plataformatec Blog
diaspora - A privacy-aware, distributed, open source social network. The diaspora* Project
capistrano - Remote multi-server automation tool A remote server automation and deployment tool written in Ruby.
sinatra - Classy web-development dressed in a DSL (official / canonical repo) Sinatra
The Ruby Programming Language
Resque is a Redis-backed Ruby library for creating background jobs, placing them on multiple queues, and processing them later.
Introducing Resque · GitHub
Spree is a complete open source e-commerce solution for Ruby on Rails.
Ecommerce Storefront and Platform Solutions | Spree Commerce
An opinionated micro-framework for creating REST-like APIs in Ruby.
Ruby Grape | An opinionated micro-framework for creating REST-like APIs in Ruby.