Not sure why Microsoft has changed the behavior in Windows 7 but its annoying that it takes up two programs in task bar when its running. Follow the link below to see the solution.
ToDoList (Free) - The best to do list software I have come across. Its a great replacement for doing quick project plans and using it as a permanent clipboard where you can organize items in hierarchy
Winsplit Revolution (Free) - Very good tool for laptops where you want to mimic two monitors on one. Allows you arrange windows with keyboard shortcuts
ZScreen : Screen capture (open source) - a great tool for anyone who needs to capture screenshots. You can associate program to open whenever you hit Print screen key.
AVG Antivirus (Free) - lightweight free anti virus software
PrimoPDF (Free) - A great tool to print anything as PDF. Sometimes when you don't have a printer available, this tool makes perfect sense to be able to make it PDF and print it later when you are connected.
Foxit Reader (Free) - A must have pdf reader, can't even compare this to bulky adobe reader. It provides alot of features for free such as Commenting, attaching files, bookmarking etc. In short makes pdf experience great.
PDFill - A very good free tool as a replacement to Adobe Writer. Can merge, create/edit forms etc.
FireFox (Free) - When talking about great free software products, how can you avoid not mentioning the excellent browser which revolutionized browser innovation
CDBurnerXP (Free) - Hands down the best lightweight CD/DVD burner product. Can make iso and burn them to a media
Virtual Clone Drive (Free) - Great tool to map iso as a drive. No need to burn DVDs, just save it as a iso and use it as a drive whenever you need it!
Crimson Editor (Free) - A great replacement to lame notepad. Highlights text for known formats. You can work with multiple files at the same time. A lot of text editing great features
CamStudio (Free) - Free screen recording software. Lets you make a avi file for the recording.