OS: FreeBSD, OpenBSD, OpenSuse
PL: PHP, C++, Python
Frameworks: onPHP, CakePHP, Jquery
Unit testing: phpunit, py.unittest
DB: Postgres, MySQL, sqlite
VCS: perforce, git, bazaar, svn, mercurial
UML: Visual Paradigm, MS Visio
Caching: memcache, xcache, apc