Linux

• CentOS
• RedHat
• Ubuntu
• Fedora
• Debian
• SUSE
• ASP Linux

Unix

• FreeBSD
• OpenBSD
• Solaris

Virtualization

• VMWare (incl. HA/Clustering)
• OpenVZ/Virtuozzo
• Xen
• OpenStack API
• KVM
• Virtualbox

Web Application Server

• Apache
• IIS
• Apache Tomcat
• Light HTTPD
• Resin/Java/jBoss
• Sun Java Application Server

Mail Services

• Qmail
• EXIM
• Postfix
• Sendmail
• Microsoft Exchange Server
• Mail Enable Mail Server
• Eudora Internet Mail Server
• iMail Server
• Dovecot
• Getmail

Control Panels

• VSFTPD
• Pure-FTPd
• ProFTPD
• WS_FTP Server
• IIS FTP
• Filezilla Server

Databases

• MySQL (Replication/Clustering)
• Microsoft SQL 2000, 2005, 2008 (DTS/SSIS/Clustering/Replication/Mirroring)
• PostgreSQL
• NoSQL Variants (Mongo, Redis)
• MS Access

Security / Availability

• Enterprise Storage Capacity Planning / Engineering
• Hardware planning and support
• Regular Expressions
• SASS
• SEO/Metadata
• Site Speed Optimization
• System Optimizations

Development

• Web Architecture Design
• Web Template Design, Graphic Design
• Authorize.net AIM, CIM, ARB integration
• Blackberry/iPhone/Android Mobile Apps development
• Mercurial/Git/SVN/DVCS
• QA / QC

Languages

• PHP
• Microsoft .NET
• Classic ASP
• ColdFusion
• Python
• Perl
• Ruby/Ruby on Rails
• Java
• JavaScript
• XML/HTML/XHTML
• CSS/CSS3/LESS
• Bash/Shell Scripting
• C/C++

Applications

• WordPress (optimization, multisite)
• Joomla / Mamba
• Drupal (optimization)
• PHP-BB
• Active Merchant
• Expression Engine
• SugarCRM
• vBulletin
• creLoaded

Shopping Carts

• Magento
• osCommerce
• X-Cart
• ZenCart
• VirtueMart
• coreCommerce
• Agora Cart
• CS-Cart
• Cart32
• ColdFusion Cart
• ColdFusion Cart
• PinnacleCart
• PrestaShop
• Ubercart
• Custom Shopping Carts