Open Source Apps for monitoring

Grafana is an open-source observability platform that enables users to query, visualize, and monitor metrics, logs, and traces across diverse data sources in real-time.

Netdata is an open-source, real-time monitoring and troubleshooting solution for IT infrastructure, offering high-resolution metrics, visualizations, and alerts without centralized data storage.

OpenStatus is an open-source monitoring platform that allows users to track API and website performance globally, identify issues, and receive alerts before users are affected.

Sentry is an application performance monitoring and error tracking software that helps developers find and fix issues in their code quickly.