TagUI : TagUI is a general purpose tool for automating web interactions
New Relic : New Relic’s SaaS-based Application Performance Monitoring helps you build, deploy, and maintain great web software.
Also, server monitoring, and more.
Watchtower : A container-based solution for automating Docker container base image updates.
OctoDNS : Tools for managing DNS across multiple providers
Pa11y : Monitor the accessibility of your websites with pa11y-dashboard, and protect against accessibility errors creeping into your codebase.
Free open source web page change detection. Simply monitor which websites had a text change.