Self-hosted, lightweight server and website monitoring and O&M tool
The Network UPS Tools repository
BGP and RPKI monitoring tool
Lightweight network IP scanner
The Active Monitoring System
pg_activity is a top like application for PostgreSQL server activity
Open-source systems performance monitor
Network Enumeration Tool for Host Exploration and Recon
A fancy self-hosted monitoring tool
High performance ping tool
An eye on your system
A Swiss army knife for your daily Linux network plumbing
Monitorix is a free, open source, lightweight system monitoring tool
Collect and display information and stats from a running PostgreSQL
Application to comfortably monitor your Internet traffic
Zeek is a powerful network analysis framework
The core of our monitoring platform
Community-based GPL-licensed network monitoring system
Centralized network visibility and continuous asset discovery
A simple server monitor tool
Open source monitoring system and time series database
Monitor and troubleshoot transactions in complex distributed systems
A full packet capturing, indexing, and database system
Apache HertzBeat(incubating) is a real-time monitoring system