About Rubygame
Rubygame is a cross-platform multimedia library for ruby, the most beautiful programming language in the world. It embraces the ruby spirit to provide developers with a library that is clean and easy to use so you can get things done painlessly, and yet powerful and flexible so you can get them done right.
Even though it's called Rubygame, it has uses far beyond entertainment software: scientific data visualisation programs, educational/training tools, and interactive motion graphics are just a few of the things you could create with Rubygame.
Rubygame is open source, licensed under the GNU LGPL. That means you are free to use, copy, modify, and distribute it, even with proprietary applications. (But be sure to read the full license for details, of course!)