Artforge (Adam)

Rails plugin to build a simple calendar scaffold, with events signified by class names added to the day.

Calendar-generating plugin for Ruby

Addressable is a replacement for the URI implementation that is part of Ruby's standard library. It more closely conforms to the relevant RFCs and adds support for IRIs and URI templates.

FaceboxRender is a Rails plugin let you use lightbox seamlessly using Facebox library (http://famspam.com/facebox/)

Organise ActiveRecord model into a tree structure

Mirror of validation reflection plugin

A diff library that uses html tags to show differences

Battle-tested capistrano recipes for ruby, rubygems, apache, passenger, delayed_job, juggernaut, thinking_sphinx, mongodb, whenever, among other popular tools

a clone of the latest release of textile_editor_helper with improvments

Inherited Resources speeds up development by making your controllers inherit all restful actions so you just have to focus on what is important.

Rails plugin for uploading images as resources, with support for resizing, text stamping, and other special effects.

A port of the YM4R-GM plugin for rails, to github

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 library.

A mini view framework for console/irb that's easy to use, even while under its influence. Console goodies include a no-wrap table, auto-pager, tree and menu.