JRuby's OpenSSL gem

Warbler chirpily constructs .war files of your Ruby applications.

JRuby, an implementation of Ruby on the JVM

Rack for JRuby and Java appservers

JRuby's ActiveRecord adapter using JDBC.

The JRuby.org site

Java parts of integrating the Prism parser into JRuby. Plugs in using an SPI

manage jar dependencies for ruby gems