Google Stackdriver Error Reporting - Aggregates and displays errors produced by cloud services
StatusPage Generator - Host your status page on GitHub
Million.js - A fast, <1kb virtual DOM
Indatus - Indatus – A Creative Editor Making Your Photos Gorgeous an all-in-one photo-editing application developed by Thang Dinh.
Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.
StatusPage.io - StatusPage.io is the best way for web infrastructure, developer API, and SaaS companies to get set up with their very own status page in minutes. Integrate public metrics and allow your customers to subscribe to be updated automatically.