Here's some silly stuff I've done.

• rBoard - Very simple web forum written in Ruby. Uses eruby and modruby on an apache webserver. These were obsoleted ages ago by Ruby on Rails, and I haven't tried to actually run it in years. I've kept this around mostly as a demonstration of what you had to do before all that awesome Ruby web stuff came around. Shows how to use cgi, talk to a database, and deal with sessions.
• rSort - Implementations and explanations of the sort algorithms you learned in Comp Sci 101. Ruby already has excellent sorting functionality built-in, so this is probably only good for beginning CS students who are looking for a straightforward implementation to use in learning. Albert Davidson Chou contributed to this project.
• Fnord in Perl