Rinn is a CORBA ORB written in Ruby. Currently, the client side of the
object-request-broker is usable.
R2CORBA is the reference implementation for the official OMG Ruby CORBA Language Mapping (RCLM). It implements the CORBA mapping both for MRI (1.8, 1.9, and 2.0 series) and JRuby.
A knowledge creation system.
A fast C++ matrix library with an API similar to Matlab's.