Effing package management! Build packages for multiple platforms (deb, rpm, etc) with great ease and sanity.

Database backed asynchronous priority queue -- Extracted from Shopify

Ruby FFI

A gem to use Rails Database Migrations in non Rails projects

Warbler chirpily constructs .war files of your Ruby applications.

Provides an irb session to a running ruby process.

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 …

a featureful rails plugin leveraging the new kickass prawn library to produce compiled pdf views

More than just a new RDoc template

A fluent, easy-to-use, object oriented Ruby HTTP/REST client library with support RFC2616 HTTP caching and async calls that runs on CRuby and JRuby.

Your local gem documentation browser

NOTE: prawn-layout has been merged into the main prawn repository as of 2010.02.25 (http://github.com/sandal/prawn), however the stable branch of prawn-layout 0.8.x is still hosted here.

Niklas Cathor's Ruby Trac XML-RPC Wrapper

Enable authentication in Redmine using SSL client certificates

rails plugin to store countries as ISO codes

Prawn extension to create flexible tables with rowspan and colspan attributes

Warbler chirpily constructs .war files of your Rails applications.

This fork has been moved to another project from scratch http://github.com/blaxter/prawn-flexible-table

Personal twitter jabber bot

Migration helpers for ActiveRecord for dealing with foreign keys

A thin wrapper to use Rails Migrations in non Rails projects

Database backed asynchronous priority queue -- Extracted from Shopify

rails plugin to store countries as ISO codes

Authorization/Authentication framework for rails

a featureful rails plugin leveraging the new kickass prawn library to produce compiled pdf views

Enable authentication in Redmine using SSL client certificates

A small script to be used for secret santa game (aka amigo invisible)

Warbler chirpily constructs .war files of your Rails applications.

Check whether a gem is compatible with jruby on http://isitjruby.com (This is a fork of rubygems-isit19)