Deos anyone know of any scripts to recommend for the monitoring of ports such as http, smtp/pop, inet etc?

Please post your knowledge

NetSaint for Unix/Linux
IPSentry for Windows
IPMonitor for Windows

Sean R.
BurstNET

what are the URL's for those? Can any of these run remotely on a computer/server to check other servers??

IPSentry: http://www.ipsentry.com
IPMonitor: http://www.deepmetrix.com/ipmonitor/index.html

There are also lots of free third-party services that monitor your website. Just do a search.