We'll respond shortly.
Some projects are playing with the Mocha mocking framework. From their site:
Mocha is a library for mocking and stubbing using a syntax like that of JMock, and SchMock. Most commonly Mocha is used in conjunction with Test::Unit, but it can be used in other contexts.
Our own Nathan Sobo has released Treetop 0.1.0:
Treetop is a Ruby-based DSL for text parsing and interpretation. It facilitates an extension of the object-oriented paradigm called syntax-oriented programming.