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

readline extension for JRuby

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

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

minitest provides a complete suite of testing facilities supporting

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

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

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

A JSON implementation as a JRuby extension.

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