OS
Windows, Linux, UNIX.
Languages
ASP.NET, C#, VB.NET, ADO.NET, PHP, Javascript, Ajax, Web2.0, XHTML, XML, XML Schema, XSLT.
Databases
MS SQL Server, MySQL.
ORM
nHibernate
Patterns
MVC, Spring.NET, Singleton.
Reports
Crystal Report Writer, ActiveReport2.
Tools
SVN Tortoise, MS Visual Source Safe
Protocols
RS232, RS485, TCP/IP.
Mail Servers and Protocols
Sendmail, Qmail, IMAP, POP3 ,Postfix.
Development tools
MS Visual Studio .NET/2008, Macromedia Dreamweaver, Flash, Fireworks, Adobe Photoshop.
Web Servers
Windows IIS, Apache,
Methodologies
UML, Design Patterns, OOAD/OOP, XProgramming.