OmniAuth is a flexible authentication system utilizing Rack middleware.
Aetherg (Aether Generator) is a sinatra application generator. Light-weight MVC framework.
Share button with China popular sites
Add geocoding functionality to Rails models.
fancyBox is a tool that offers a nice and elegant way to add zooming functionality for images, ht...
A sample page of html assets, css reset, jquery, grids layout
A tiny shorten url sinatra app - with API
Organise ActiveRecord model into a tree structure
Use Hashids (http://hashids.org/ruby/) in your Rails app ActiveRecord models.
Self-hosted RSS Service, can used by Reeder with standard XML protocol.