Java (J2EE, J2SE, J2ME), C, C++, Pascal, Delphi

Perl, PHP, Bash, Action Script, VRML, (X)HTML, JavaScript, CSS

Linux/Unix system administration (Debian, Gentoo, Ubuntu, Fedora, RedHat, SuSE, Madriva, Solaris)

virtualization (Linux VServer, Virtualbox, VMWare ESX)

Content Management Systems (TYPO3, Joomla)

Databases (MySQL, PostgreSQL, Informix)

Webserver administration (Apache, Tomcat)

Mailserver administration (Postfix)

Netzwork administration and security

Design patterns

Search engine optimization

3D-modeling (KPovModeler, 3D Studio Max, Maya, Blender)