Nagios - Complete monitoring and alerting for servers, switches, applications, and services
The Dude - MikroTik is a Latvian company which was founded in 1996 to develop routers and wireless ISP systems. MikroTik now provides hardware and software for Internet connectivity in most of the countries around the world.
Gitwin - Enable your Windows system as a powerful and secure Git repository. Supports ssh, http(s) transports. Gitweb with highlighter and gravatar support available.
Pandora FMS - Pandora FMS: Opensource monitoring software
Zenoss Core - Zenoss (Zenoss Core) is an open source application, server and network management platform based on...
cStatus - Monitor and scan a network.