Nagios - Complete monitoring and alerting for servers, switches, applications, and services
System Center Operations Manager - System Center Operations Manager 2012 R2 uniquely enables customers to reduce the cost of data...
Gitwin - Enable your Windows system as a powerful and secure Git repository. Supports ssh, http(s) transports. Gitweb with highlighter and gravatar support available.
Trafikito - Monitor CPU, RAM... or output of any command and make API call on event, default is email messages.
Opsview Atom - Monitor everything. Integrate anything. Scale anywhere.
Zabbix - Track, record, alert and visualize performance and availability of IT resources