Key Finder

use to find installed product cd key

http://magicaljellybean.com/keyfinder.shtml

Angry IP Scanner

Angry IP scanner is a very fast IP scanner for Windows. It can scan IPs in any range.
http://www.angryziber.com/ipscan/

Forgot Administrator Password

http://www.petri.co.il/forgot_administrator_password.htm

Chapta's DVR open ports

Port 25, 110, 143, 8000
I know about the port 8000 but others are for what I don't know