manage jar dependencies for gems and keep track which jar was already loaded using maven artifact coordinates. it warns ...

readline extension for JRuby

JRuby-OpenSSL is an add-on gem for JRuby that emulates the Ruby OpenSSL native library.

A JSON implementation as a JRuby extension.

Psych is a YAML parser and emitter. Psych leverages libyaml[http://pyyaml.org/wiki/LibYAML]

RDoc produces HTML and command-line documentation for Ruby projects. RDoc

minitest provides a complete suite of testing facilities supporting

Power Assert for Ruby. Power Assert shows each value of variables and method calls in the expression. It is useful for ...

Rake is a Make-like program implemented in Ruby. Tasks and dependencies arespecified in standard Ruby syntax.

Test::Unit (test-unit) is unit testing framework for Ruby, based on xUnit