Even thoug that I don't have a single PC around. Here are the programs that I use frequently.

Internet Browsing: MSIE 6
Instant Messaging: MSN and Yahoo!
Audio Playing: Winamp
Web Design and Development: Macromedia Dreamweaver MX
Image Processing: Macromedia Fireworks MX and Adobe Photoshop 7
FTP: SSH Secure File Transfer Client
Terminal (Remote Login): SSH Secure Shell Client
CD Burning (In figurative sense): Nero Express
File Archiving: WinZip and WinRAR
IDEs: JCreator for Java
Word Processing: MS Word
File Sharing: none