Self-hosted, lightweight server and website monitoring and O&M tool
A suite of Monitoring Plugins (formerly known as nagios-plugins)
The Network UPS Tools repository
A utility to safely generate malicious network traffic patterns
Floating window used to display current network speed, CPU & memory
The Active Monitoring System
Lightweight network IP scanner
Monitor temperature sensors, fan speed, voltage, load & clock speeds
BGP and RPKI monitoring tool
Open-source systems performance monitor
Monitoring Tool for your IT Environment
Apache HertzBeat(incubating) is a real-time monitoring system
Community-based GPL-licensed network monitoring system
pg_activity is a top like application for PostgreSQL server activity
An eye on your system
Application to comfortably monitor your Internet traffic
The core of our monitoring platform
Open source monitoring system and time series database
Cross-platform lib for process and system monitoring in Python
A distributed and high-performance monitoring system
Monitor and troubleshoot transactions in complex distributed systems
A fancy self-hosted monitoring tool
Free and Open Source network access control (NAC) solution
A full packet capturing, indexing, and database system
A simple program to monitor your network/data usage