ServerSuit - ServerSuit is a browser based program that enables remote Linux administration, monitoring, website hosting, and server setup automation.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services
Gitwin - Enable your Windows system as a powerful and secure Git repository. Supports ssh, http(s) transports. Gitweb with highlighter and gravatar support available.
RedGate SQL Monitor - SQL Monitor helps you and your team find issues – before they become problems
LANState - LANState - Network Mapper and Device Monitor
CULA - A webmonitoring solution for beginners and pros.