The Network UPS Tools repository
Self-hosted, lightweight server and website monitoring and O&M tool
A suite of Monitoring Plugins (formerly known as nagios-plugins)
Community-based GPL-licensed network monitoring system
Floating window used to display current network speed, CPU & memory
Lightweight network IP scanner
The Active Monitoring System
Monitor temperature sensors, fan speed, voltage, load & clock speeds
Open-source systems performance monitor
Application Performance Monitoring System
Application to comfortably monitor your Internet traffic
The core of our monitoring platform
BGP and RPKI monitoring tool
An eye on your system
Centralized network visibility and continuous asset discovery
Monitorix is a free, open source, lightweight system monitoring tool
Monitor and troubleshoot transactions in complex distributed systems
A full packet capturing, indexing, and database system
Open source monitoring system and time series database
Apache HertzBeat(incubating) is a real-time monitoring system
pg_activity is a top like application for PostgreSQL server activity
Zeek is a powerful network analysis framework
Monitor temperature sensors, fan speeds, voltages, load & clock speeds
Performance Co-Pilot
A fancy self-hosted monitoring tool