PRTG Network Monitor (Free Edition)

PRTG by Paessler is a network monitoring solution that can track system health, bandwidth, and applications. The free edition allows up to 100 sensors, providing threshold-based alerts for potential incidents. A web dashboard and mobile apps keep admins informed. While primarily for infrastructure monitoring, PRTG can be used to trigger incident workflows upon alarms. It suits small IT teams wanting a free monitoring suite with basic incident notifications and no recurring fees.