What is the best server monitoring software out?
 

Looking for something windows based that i can put on a spare p.c. to monitor all my servers/virtual accounts etc.

Also whats a good linux/unix based solution.

Not a single idea?

hyperspin does a good job and its pretty cheap

is it software or a service?...url?

remote service

http://www.alertra.com/

for windows, IP Monitor (http://www.ipmonitor.com/)
try the evaluation, see it it suits you.

for linux/bsd, Nagios (http://www.nagios.org/)
its free, but will take your time to install.

or use third-party monitoring websites

Nagios is good

What he said.