Databases: PostgreSQL, MySQL
Operation systems: Linux (Debian/Gnu Linux, Ubuntu, Linux Mint, Mandriva, Red Hat Linux etc. any graphical desktop and console mode), MS Windows (2000, XP, Vista, Seven, 8.1, 10)
Coding: php, php command line interface, oops php development, unix shell scripting, html, javascrips, css.
Linux Server Administration: apache, php, mysql/postgresql, squid, iptables, iproute, samba clamav-daemon, samba domain controller, bind9, irc, vpn, nfs, ftp, ntp, cron, subversion, log etc..
Tools / Software: Adobe (Macromedia) Dreamweaver, Adobe Photoshop, Kdevelop, Vim, NetBeans IDE, JetBrains PhpStorm, vim, EMS MySQL\PostgreSQL Manager, Navicat, PHPMyAdmin, PHPPgAdmin, Jira, Subversion
Network analysis: wireshark, nmap, automation network analysis