limelight is a free GUI library for Ruby, Clojure and/or Java. In other words, Limelight is a unique, powerful client GUI framework.
Bringning something new to GUI development, Limelight gives you the power to develop a wide range of applications from business tools to games.
Limelight was designed to be as simple to work with as possible. Its APIs have been molded such that development requires minimal syntax and no duplication.
Therefore, the APIs are a breeze to learn and development is blazingly fast.
Instructions on how to install and use the limelight utility on your Mac are available HERE.
limelight is cross-platform and it works on Mac OS X, Windows and Linux. Binaries for the Windows and Linux platforms are available on the project's homepage.