Greasemonkey update - free, Firefox required
Updowngrade Greasemonkey to avoid getting hit by malicious scriptsRSS Screensaver - free, Windows
Make your 'saver display the latest headlines from your favorite sitesSuper DragAndGo Firefox extension - free, Firefox required
Drag and drop urls on a page to open in foreground or background tabs; check out the included screencast to see what I meanMicrosoft Excel templates - free, Mac or PC
Peronsonal finance Excel spreadsheet templates like a monthly family budget and rent vs buy calculatorThunderbird 1.0.5 - free, Mac or PC
Update to Lifehacker's favorite email application
