Balto - Easy feedback with screenshot / videos for your beta apps
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.
SessionStack - Record and replay web app issues. See them the way they happened to end users.
Rollbar - Rollbar collects errors that happen in your application, notifies you, and analyzes them so you can debug and fix them. Ruby, Python, PHP, Node.js, JavaScript, and Flash libraries available.
Video Contact Forms by Typeform - Get 10x more personal with your site's visitors from Day 1
RootCause - Record, Replay and Reproduce JavaScript Errors