Google Stackdriver Error Reporting - Aggregates and displays errors produced by cloud services
Pretzel - Keyboard shortcuts for the app you're currently using
Million.js - A fast, <1kb virtual DOM
Apptivate - A simple, beautiful hotkey manager.
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.
Keysmith - Create custom keyboard shortcuts for your Mac and the web