System-Administration:
FreeBSD
Linux (Debian, Gentoo)
MacOS X

Serversoftware:
Web: Apache
DNS: Bind, PowerDNS
E-Mail: Exim, Postfix, Sendmail
IMAP: Courier, Dovecot
Datenbanken: MySQL

Softwareerstellung (C, C++, Java, Perl, PHP)

Anpassung Typo3

Webspace / FTP-Space / WebDAV / Hostmasterservice