DiskDigger is "an all-in-one undelete and recover utility that’s simple, straightforward, easy to use, and most importantly, free!"
In my personal testing, this was the only software out of a half a dozen that managed to find/recover any files from a hard drive that was completely unreadable by any other method.
A free alternative to pcAnywhere
"UltraVNC is a powerful, easy to use and free software that can display the screen of another computer (via internet or network) on your own screen. The program allows you to use your mouse and keyboard to control the other PC remotely. It means that you can work on a remote computer, as if you were sitting in front of it, right from your current location."
Free alternative to U3 Smart Software
If you've ever used a flash drive with U3 software, you may have noticed its weird cd-emulating drivers that use 2 drive letters. You may have also noticed when looking for more software to add from their site, most of them are not free. PortableApps offers an ever-expanding list of free applications you can add to your flash drive that runs on a pretty slick menu of its own. Its features are best described on the site itself, so check it out: