Lets you figure out if your gems and gems you install might work on JRuby. Uses http://isitrubyjruby.com as its datastore. Be sure to update the website with your experiences!

Immutable Attributes is an ActiveRecord extension that prevents existing data from changing

A web framework for Javascript.

Automate adding stylesheets and javascripts to your controller actions

JAMES' VERSION OF This library makes it easy to implement REST-like web services APIs.

Determine whether the HTTP user agent talking to your code is a web spider.

Celerity is a JRuby library for easy and fast functional test automation for web applications. It is a JRuby wrapper around HtmlUnit – a headless Java browser with JavaScript support. It provides a simple API for programmatic navigation through web applications. Celerity aims at being API com...

Ruby Apriori is a library to efficiently find item association rules within large sets of transactions.

Generates the stub files needed for testing with jasmine on a webos application. Runs a server to view your tests against.

Ruby-based client for JasperServer. Allows for requesting and fetching reports using Ruby from a networked JasperServer over SOAP.

JDTc provides a wrapper around eclipse's java compiler, this makes it a dropin replacement for sun's javac. This would be used to later build eclipse based plugins using rake/buildr using buildr4eclipse (http://buildr4eclipse.googlecode.com/)

Sequel plugin designed to maintain a revision history of an object. Sequel_revisioned will create a revision table and model specific to the class that calls `is :revisioned`. It's set up this way to allow multiple tables to maintain revisions without interfering with each other.

Make JavaScript look and feel like Ruby -- fancy JavaScript preprocessor. More info to come later.

A nice generator for a Jekyll website including Disqus comments integration. Probably tightly integrated to github and Github Pages. Will be relaxed later.

S3 backup and restore program

A gem packaging of the {Jetty Web Server}[http://www.mortbay.org/jetty/] for JRuby: * Provides jetty, jetty-util, servlet-api, and jetty-rewrite-handler \ jars. * A Jetty::ServerFactory for simple programmatic server setup in ruby. * A set of Jetty::TestServlets containing a SnoopServlet and ...

A gem packaging of the {Jetty Web Server}[http://www.mortbay.org/jetty/] JSP 2.1 support for JRuby. This gem is provided as a companion to the jetty[http://rjack.rubyforge.org/jetty/] gem.

Jetty Rails aims to run Ruby on Rails and Merb applications with the Jetty Container, leveraging the power of JRuby and jruby-rack. {Jetty}[http://jetty.mortbay.com/jetty/] is an excellent Java Web Server, being and at the same time extremely lightweight. This makes jetty-rails a good alternativ...

JEXML is a JRuby gem that provides a thin Ruby wrapper around the XML APIs in the JDK.

A jig is an ordered sequence of objects (usually strings) and named _gaps_. When rendered as a string by Jig#to_s, the objects are rendered calling #to_s on each object in order. The gaps are skipped. A new jig may be constructed from an existing jig by 'plugging' one or more of the named gaps....