Checkmk - Checkmk - the software for effective IT monitoring
Gitwin - Enable your Windows system as a powerful and secure Git repository. Supports ssh, http(s) transports. Gitweb with highlighter and gravatar support available.
Zabbix - Track, record, alert and visualize performance and availability of IT resources
LANState - LANState - Network Mapper and Device Monitor
Cloudlytics - Analyze Your Amazon S3 & CloudFront Logs.
Nagios - Complete monitoring and alerting for servers, switches, applications, and services