Must have free software

Home/Desktop

1. VLC media player
2. OpenOffice.org
3. Adobe Reader (Windows)
   
4. Paint.NET (Windows, Linux possible on Mono)
   
5. The GIMP
6. Picasa
   

Internet

1. Mozilla Firefox / Opera
2. Thunderbird Email Client
3. Free Download Manager (Windows)
   
4. Ad-Aware (Windows)
   

Utility

1. 7-zip (no GUI on Linux)