I use open source every day software every day. We would be nowhere without it. Here's a short list of some of the projects I've contributed to over the years. This list is incomplete. Check my github page for more up to date list.

homebrew

The missing package manager for OS X.

ruby-bencode

Ruby library for reading Bencode format (used by bittorrent among others).

merb-i18n

Internationalization library for Merb.

jekyll_alias_generator

A plugin for Jekyll blogging framework for specifying multiple URLs for one page.

ActiveMerchant Patch

I contributed a patch for the MerchantWarrior gateway. I created this patch for a client.