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
Lightweight network IP scanner
Monitor temperature sensors, fan speed, voltage, load & clock speeds
Application to comfortably monitor your Internet traffic
Apache HertzBeat(incubating) is a real-time monitoring system
Monitoring Tool for your IT Environment
Community-based GPL-licensed network monitoring system
Open source monitoring system and time series database
An eye on your system
pg_activity is a top like application for PostgreSQL server activity
A full packet capturing, indexing, and database system
Monitor and troubleshoot transactions in complex distributed systems
A distributed and high-performance monitoring system
A Swiss army knife for your daily Linux network plumbing
A fancy self-hosted monitoring tool
Performance Co-Pilot
A simple program to monitor your network/data usage
Application Performance Monitoring System
SQL operating system instrumentation and monitoring framework
Monitorix is a free, open source, lightweight system monitoring tool
The core of our monitoring platform