Free browser plugin to measures page load time and displays it in the toolbar.

Vigil is an open-source Status Page you can host on your infrastructure, used to monitor all your servers and apps, and visible to your users.

Meticulous monitors your daily interactions with your application as you develop it

Uptime Kuma is an easy-to-use self-hosted monitoring tool.

All-in-one observability. New Relic Dashboard Video Tour Video Tour Data for engineers to monitor, debug, and improve their entire stack.

Create automatic monitors for detecting and scanning changes on web pages, evaluate content based on conditions you define and trigger actions such as notifications, sounds, emails etc.