Server Monitor Tools

A1Monitor
Windows-based web server monitoring utility from A1Tech. Email notification and automatic web server are available.
Alchemy Eye
Server monitoring tool for availability and performance. Vendor is Alchemy Lab. Notifications can be by cell phone, pager, e-mail. External programs can be executed externally and events loggeed.
Loadrunner
Load and stress testing tool for web applications. Network, application and server monitors offered for performance measurement of each tier, server and component.