Nagios - Complete monitoring and alerting for servers, switches, applications, and services
ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
Gitwin - Enable your Windows system as a powerful and secure Git repository. Supports ssh, http(s) transports. Gitweb with highlighter and gravatar support available.
LANState - LANState - Network Mapper and Device Monitor
RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems
System Center Operations Manager - System Center Operations Manager 2012 R2 uniquely enables customers to reduce the cost of data...