O/S:

Windows 9x / 2000 / NT / Linux

Web development:

Java applets, Servlets, J2EE, JSP, Swing, ASP, ASP.Net, XML, Enterprise JavaBeans, VB, VB.Net

Client-Server GUI:

PowerBuilder / VB  

Middleware:

COM / DCOM / CORBA   

RDBMS:

MS SQL Server 6.5 / 7.0/2000, Oracle, MSAccess, MySQL  

Multimedia:

Adobe Photoshop, Flash and Shock Wave