Technologies

Programming languages

PHP, PERL, C, C++, Linux Shell Scripting, JavaScript.

Operating systems

Linux: Debian, Ubuntu, RedHat, CentOs, Fedora.

RDBMS

MySQL, Oracle, SQL Server.

Web servers

Apache, Lighttpd.

Content versioning systems

SVN, CVS.

Other

HTML, XHTML, CSS, AJAX, XML, XSLT.