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