VisualVM is an All-in-One Java Troubleshooting Tool
App observability facade for the most popular observability tools
Distributed Tracing, Metrics and Context Propagation for applications
Dashboard and code-driven configuration for Laravel queues
Monitors a number of web pages for changes.
Lighweight CRM, easy to use Kickstarter for web based ERP
The Free & Popular HESK Web Based Software in Complete Virtual Machine
Java Job Scheduling and Task Automation
JENNOM - Java Enterprise Network Nodes Monitor
OpenDDS is open source publish/subscribe middleware
Logging utility for DB2 for LUW written in SQL-PL
CORBA Server Monitoring service
Database monitoring agent for zabbix
Pinger alert, STATICTICAL TABLES, send EMAILs or SMS by SMS GATEWAY
Open source tool to monitor your servers and websites
Open Source Social Network Kit written in PHP
IP Monitor notifies you when your public IP address changes
MySQL Replication Monitor (written in PHP)