Programming languages
C/C++, C#, Pascal/Delphi, Java (JEE, JSE), Objective C, Javascript
Mobile
iOS, Android, Windows Mobile, BlackBerry, Kobold2D, Cocos2D, Cocoa Touch, Gameplay
Web
Play Framework, ICEfaces, JavaScript, Knockout.js, Bootstrap, jQuery, CoffeeScript, HTML/HTML5, CSS2/CSS3, AJAX, XML/XSD, REST, SOAP, JSP/JSF, XHTML, React.js, WordPress, Prestashop
Microsoft
.NET Framework, Windows Communication Foundation, Windows Presentation Foundation, Windows Forms, Entity Framework
IDE
Microsoft Visual Studio, Eclipse, xCode, IntelliJ IDEA, Android Studio, Sublime
Databases
MySQL, Oracle, PostgreSQL, MongoDB, SQLite, Microsoft SQL Server, SQL Server, Paradox, Cassandra, Redis
Operating Servers
Different Linux flavors, different Windows flavors, Mac OS X
Servers:
Nginx, Apache, Jboss, Tomcat, Netty, IIS, Node.js, Amazon EC2
Versioning Systems:
Git, SVN, CVS, CMVC, PVCS
Issue & Project Tracking:
Bugzilla, Mantis, Redmine, JIRA, Gitlab, Github
Build/Automation/Continuous Integration:
Maven, Ant, Jenkins, Gradle
Other:
Guice, Guava, Shell script, Hibernate, Spring, MFC, STL, Red5, COM, Web Services, Design Patterns, UML, ERD, SSL/OpenSSL, Splunk