Web Browser: Firefox 1.5
The perfect free Open source Web-browser
Mulit-Client Messenger: Gaim
The best MultiClient Messenger I’ve found. MSN, Yahoo, AIM etc in a tabbed window
Programming IDE: Visual C# 2005 Express Edition
Burning Software: Nero 6
Great for burning pretty much everything to CD or DVD
Web Editor: Dreamweaver 8
Very good Editor for any type of website/webfile, with a ftp client built-in.
Disc Copying: Alcohol 120%
Copies and emulates Pretty much any disc, and has a Virtual drive for images.
Music Player: iTunes 6
I use Itunes because it likes my ipod nano and apart from being a bit of a bloater, works pretty well.
Video Palyer: Media player Classic + Klite Codec Pack
This package along with Media player classic plays pretty much any video you can throw at it.
Cleanup and Repair: TuneUp Utilities 2006
Image Editing: Paint.NET
Not overcomplex, but does most image things i need and its free too.
File Compression: WinRAR 3.5
Winrar is a must have for anyone using the internet for uncompressing everytype of archive.
Email: Thunderbird 1.5
Firefox companion for email, and RSS too.
Bitorrent: uTorrent 1.3
Without a doubt the best bittorrent program around. Tiny, fast and full of great features.
Image Organisation: Picasa 2
Keeps track of all your pictures and does some simple editing too, a must for flickr addicts.