Trollop is a commandline option parser for Ruby that just gets out of your way. One line of code per option is all you need to write. For that, you get a nice automatically-generated help page, robust option parsing, and sensible defaults for everything
A Place to Start for the Future (ruby) Programmer
Examples to place several option parser into a real-world context
Ōlelo is a wiki that stores pages in a Git repository, supports many markup styles and has an extensible, hackable architecture! If you want to see a demo installation go to http://www.gitwiki.org/.
Font-icons for Compass allow for quick deployment of pictogram icon sets in any compass web project.
Xiki: A shell console with GUI features.Xiki does what shell consoles do, but lets you edit everything at any time. It's trivial to make your own commands and menus to access other tools.
Ruby library for rendering safe templates which cannot affect the security of the server they are rendered on.
Generate custom icon webfonts from the comfort of the command line.