Server Monitor 

Server Monitor is a Windows service that monitors the health and availability of Windows servers, network services (on Windows, Linux and other operating systems), and devices. No agents are needed to monitor remote servers.
server monitor restart service server monitoring disk space monitor web page monitor event log monitor ping monitor performance counters service monitor file change monitor directory change monitor email alerts pager alert reboot server

httpZip 

Port80's httpZip IIS Web server module reduces bandwidth costs, improves site speed, and better leverages server resources. Powerful HTTP compression reduces page sizes for most common file types and automatically addresses browser incompatibilities.
httpzip http zip http compression iis compression asp compress coldfusion reduce bandwidth expenses gzip

AdventNet ManageEngine OpUtils 

The AdventNet ManageEngine OpUtils is a comprehensive set of 40+ unique system and network monitoring tools. This web-based software helps IT administrators monitor, diagnose and troubleshoot their IT resources. OpUtils is web-based and very quick.
network utilities system utilities network tools switch port mapping network troubleshooting network monitoring cpu monitor memory utilization diagnostic tools bandwidth monitoring cisco router monitoring address monitoring cpu desktop monitoring snmp monitoring