Monit

Monit is a free open source utility for managing and monitoring, processes, files, directories and filesystems on a UNIX system. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.

Cacti

Cacti is a complete network graphing solution. It provides a fast poller, advanced graph templating, multiple data acquisition methods, and user management features.

PRTG Network Monitor

An advanced network monitoring solution to monitor network up/downtime, traffic and usage.

Sensu

Monitor servers, services, application health, and business KPIs. Get notified about failures before your users do. Collect and analyze custom metrics. Give your business the competitive advantage it deserves.

Spiceworks Help Desk

Help desk software features that work for IT

ntop

ntopng High-Speed Web-based Traffic Analysis and Flow Collection ntopng is the next generation version of the original ntop, a network traffic probe that monitors network usage. ntopng is based on …

sysvinit

Savannah is a central point for development, distribution and maintenance of free software, both GNU and non-GNU.