IrfanView is a great graphic viewer - although it continues to evolve and surprise. Presently, it is already a basic image editor. This one is not to be missed.
EditPad Classic is a great Notepad replacement - I wouldn't be without this one.
Outlook Express Backup Genie is a handy email backup utility which works with popular email clients such as Microsoft Outlook, Outlook Express, Eudora, Netscape Messenger, IncrediMail and PocoMail.
Color Wheel Expert is an easy-to-use application for anyone who works with color, allowing you to create your own color schemes and palettes.
Anyone serious about PowerPoint should never be without the PPTools Starter Kit - it contains essential stuff that Microsoft forgot!
Eyedropper is another cool application - a magic colour picker which can suck a shade from anywhere on the desktop.
PowerArchiver is a great archiving program which handles many compressed formats.
Adobe's Acrobat Reader is a must-have application to view PDF files.