Microsoft Virtual PC 2007

Run virtual PCs in different Windows OSes with this Microsoft program.

DriveImage XML

Add a sweet Vista Ultimate feature--exact duplicate disk imaging--to a Vista Home Premium machine.

Shift Any Version of Windows Into High Gear

Use the OS's own tools to maximize your PC's performance without spending a dime.

on techhive.com

Free Hide Folder

Make a folder and its subfolders completely invisible.

PowerMenu

Make your application windows transparent--to the degree you specify--with this freebie.

Free Launch Bar

Replace Windows's bulky Quick Launch bar with a bar that lets you group your shortcuts.