Nagios - Complete monitoring and alerting for servers, switches, applications, and services
Zabbix - Track, record, alert and visualize performance and availability of IT resources
Gitwin - Enable your Windows system as a powerful and secure Git repository. Supports ssh, http(s) transports. Gitweb with highlighter and gravatar support available.
Linux Dash - A drop-in, low-overhead monitoring web dashboard for a Linux machine.
LANState - LANState - Network Mapper and Device Monitor
Netdata - Monitor your servers, containers, and applications, in high-resolution and in real-time.