Giving back to the community
Not a contributor to only one project, I dive into codebases of open-source software I use to fix what ails me. Then I submit my modifications as a "patch" to the projects' owners for integration.
Here's a list of things I've touched:
KKRC dotfile management tool
This script provides better way to install and maintain vimrc, screenrc and zshrc files on unices.
GIT-OSX-installer (source control system)
Patch to fix a missing Term/ReadKey.pm PERL module issue.
Zend Framework (PHP framework)
Better lighttpd rewrite rule in documentation.
vTiger (CRM system)
Meatball Wiki (wiki engine)
Bugfix regarding page caching
Vim (programmer's editor)
Patch to temporarily toggle the case sensitivity in search.
MySQL plugin for "netrw", to directly edit database content (not released).
Battle for Wesnoth (game)
Multiplayer end-turn notification.
Feng Office (project management system)
Minor fix to the RSS feed generator.
ELKS (embedded Linux kernel)
Usage of a HGC/MDA monitor.
OpenBSD (super-secure Unix variant)
Bug report re: NE1000 network cards.
Slash'em (game, a Nethack variant)
Bugfixes (regarding path-finding movement)