`ai` is an application installer for Mac OS X. Packages are defined in '.aip' (ai packages) files (YAML-syntax). Currently, there is no online repository, you can find some packages here.
Pre-pre-alpha install (Mac OS X Leopard -- or other OS X with Ruby and RubyGems): download the installer (ai.rb).
Don't worry, this will not eat your cat.
Download (or make) a package (aip file), and just run `sudo ai thepackagefile.aip` and enjoy.
Any feedback is appreciated, especially for the future of this project. Contact me!