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

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

A JSON implementation as a JRuby extension.

Ruby FFI library

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

maven support for ruby DSL pom files. MRI needs java/javac installed.

JUnit Jupiter is the API for writing tests using JUnit 5.