I downloaded Thoosje Vista sidebar for XP today
Code:
http://www.thoosje.com/sidebar.html
Its really cool. I added three gadgets to my sidebar:
A clock,gmail notifier and the weather gadget.
Visit weather.com to get your location's unique zipcode and enter it in the gadget's preference.
Code:
http://www.weather.com/
Windows 7 sidebar for both XP and vista, here
Code:
http://www.thoosje.com/windows-7-sidebar-for-xp-and-vista.html
For more free tools, skins just visit Flock browser (based on Firefox 3.0)
Excellent browser which supports the latest add-ons too, (if they are compatible with FF 3.0)
This is actually a social networking browser with a sidepanel which opens when ypu login to twitter or facebook,etc.
Download here:Add-ons can be downloaded and installed from the usual Mozilla add-ons site.
Try Rocketdock or stardock if you want a cool looking taskbar