2006: C, javascript
2007: C++, PHP
2008: C#(.net), Java
2009: C++(Qt)
2010: javascript(jquery), javascript(Extjs), PHP(symfony)
2011: java(android)
2012: PHP(Symfony2), Ruby(on rails), Javascript(backbone.js)

1998-2000: Windows 98
2000-2001: Windows 98, WIndows Me
2002-2006: Windows XP
2007: Xubuntu, Windows XP
2008: Xubuntu, CentOs, Windows XP
2009: OpenSUSE, Debian, Windows 7, Ubuntu
2010: OpenSuse, Debian, Ubuntu
2011: Ubuntu, Debian, CentOS
2012: Ubuntu, Debian