Mozilla firefox - the best web browser
Pdf995 for creating pdfs.
Freemind for creating mind maps
Easy cleaner for keeping the PC clean
Graph paper printer for producing any kind of graph paper
Mindman personal for more mind maps
Zone alarm firewall
Yahoo desktop search
Wisdom-soft screen hunter
Adaware for getting rid of spyware
Spybot for also getting rid of spyware
Picassa for sorting out the pictures
Irfan view for viewing and resizing pictures.
Any other suggestions?