GemInstaller provides automated installation, loading and activation of RubyGems.
2016-12-14 - being deprecated in favour of Bundler
A human-friendly data serialization standard for all programming languages.
YAML: YAML Ain't Markup Language
As 3D rendering engine that abstracts from the underlying system libraries, like Direct3D and OpenGL.
Ogre.rb wraps the main OGRE Rendering Engine, giving access to it from Ruby.
OGRE = Object-Oriented Graphics Rendering Engine
Apparently it requires sqlite - but gem is fucking insane and locks my system up trying to update.
nice -n gem install sqlite
2016-12-15 - It seems this project has been abandoned and perhaps the entire author is gone.
A Ruby blog. Very simple and fast and cool. Makes micro-mailing lists: Comments are done via email!
I learned about it through sup's blog (all-thing.net is apparently gone)
A console email client
2010-01-02 - obnoxiously complicated and hacker-centric
The web browser as a graphical user interface for Ruby applications.
While it's real, it's not in heavy development and is still alpha as of June 2006.