Here's a few freebies I found useful:

http://www.freedownloadmanager.org/

http://www.belarcadvisor.com (personal use computer inventory hardware and software installed)

http://www.RJLsoftware (Simple Search & Replace)

I'll second on ccleaner...great little program.

Open Office, Org

Firefox, of course!

MRU blaster is great and fast by Javacool Software. http://www.wildersecurity.com

Have fun!

Sandi Bowman