Ruby on Rails

Pagination library for Rails and other Ruby applications

A tagging plugin for Rails applications that allows for custom tagging along dynamic contexts.

A simple ruby authentication solution.

Official Geokit Gem. Geokit gem provides geocoding and distance/heading calculations. Pair with the geokit-rails plugin for full-fledged location-based app functionality.

Sphinx/Manticore plugin for ActiveRecord/Rails

Official Geokit plugin for Rails/ActiveRecord. Provides location-based goodness for your Rails app. Requires the Geokit gem.

The facebooker Rails plugin

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 …

An example rails app using the Authlogic authentication library

Facebook Connect for Authlogic

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

This plugin provides a flexible way to add authorization to Rails.

Vote and Karma Management

Natural-looking Finder Queries for ActiveRecord

Rails plugin for auto_complete with jQuery instead of Prototype/Scriptaculous

a better version of this functionality is in rails 2.3. use that!

Fu-fu: The Profanity Filter for Rails.

Natural-looking Finder Queries for ActiveRecord