I started putting together this list, and got a bit carried away. It ended up turning into a recommended list of free (mostly open-source) tools to do almost all of the essential tasks most people require of their computer.
Almost all of the programs mentioned below are free open source software, though some are free versions of larger commercial products. Also note that this article is primarily aimed at Windows PC users, but almost all of these tools are also available on OSX and Linux.
Forget your Windows password? Yes? How are you going to log in! If you don't know your password, it can really take away from that whole "using of the computer" idea. Thankfully, a bunch of Swiss developers have put together Ophcrack, a free and open source program that will crack the password on your Windows XP, Vista, or Win7 account.
Although Norton Ghost 15 is not a freeware software, but the result of this tutorial even for the ones that doesn't have a product key will benefit from the system recovery ISO we will make and put on USB later, which contains many professional free tools you can use, so be patient, you won't regret it, follow the steps and good luck.
Download The PortableApps.com Platform 10.0 your computer, without the computer™
The PortableApps.com Platform™ is a full-featured portable software menu, backup utility, app store, automatic updater and application management system that ties all your portable apps together and lets you build your own custom portable app suite. Add new apps with the portable app store, organize them by category or folder, choose the look and color you want and automatically update everything, all with one easy-to-use system. Just drop it on your portable device and you're ready to go.
the Windows Twitter client you'll love to use. Frenzy uses Dropbox to store your feed items and keep everything in sync. You don't need another account and there's no other server involved.