BizTalk360 - BizTalk360 is a web based production support/monitoring tool for Microsoft BizTalk Server.
NIXStats - SaaS monitoring tool for window/linux servers and websites. Think up-time robot but with more features.
Zohno Z-Term - The Easy-to-Use Active Directory User Termination Tool
mackerel.io - mackerel.io is a server and application performance monitoring platform.
Server Density - Trusted monitoring built by experts.
NewRelic - New Relic is a Software Analytics company that makes sense of billions of metrics across millions of apps. We help the people who build modern software understand the stories their data is trying to tell them.