P2P Apps

Kazaa - All Varients - inc K-Lite
eMule - All Varient
eDonkey
LimeWire
OverNet
Ares
Azureus
Burst
Bit Torrent (Official)
ABC
Bit Comet

Messaging Apps

Mirc
MSN Messenger
Windows Messenger
Yahoo
ICQ
Aim (AOL Instant Messenger)
Trillian

Internet Apps

Internet Explorer
Firefox

Misc. Apps & Games

Notepad
WordPad
FreeCell
MS Hearts
Minesweeper
Pinball
Solitaire
Spider Solitaire

System Utils.

Regedit
Task Manager
MS Config
Command Prompt (CMD and Command)
Run Dialog