PHP Server Monitor is an open source tool to monitor your servers and websites. ...more

Monit is a free, open source process supervision tool for Unix and Linux. ...more

LibreNMS is an auto-discovering PHP/MySQL-based network monitoring system. ...more

ntop is software that probes a computer network to show network use in a way similar to what the program top does for processes. ...more

Cacti is a network graphing solution designed to harness the power of RRDTool's data storage and graphing functionality. ...more

AWStats is an open source Web analytics reporting tool, suitable for analyzing data from Internet services such as web, streaming media, mail, and FTP servers. AWStats parses and analyzes server log files, producing HTML reports. ...more

Icinga is an open source computer system and network monitoring application. ...more

Pandora FMS (Pandora Flexible Monitoring System) is software for monitoring computer networks. ...more

Nagios known as Nagios Core, is a free and open source computer-software application that monitors systems, networks and infrastructure. ...more

Zabbix is enterprise open source monitoring software for networks and applications. ...more

Munin is a networked resource monitoring tool that can help analyze resource trends. ...more