Usefull command line utilities

I decided to put some command line utilities what I use and always forgot here. I will update the list:
Terminal services
works on Vista
qwinsta - query terminal services connection
rwinsta - logoff terminal services connection or any local session

General:
Works on Vista and Windows 2008
query { PROCESS SESSION TERMSERVER USER }

Network:
netstat - Displays protocol statistics and current TCP/IP network connections

* all utilities have help just add /? after the utility name or Google it.