Rollbar - Real-time Error Tracking for Ruby, Python, PHP, Node.js, Javascript, and Flash. Sentry • Ship With Confidence.
ExceptionHub | JavaScript Error Tracking. Proxino: Monitor and Debug your Client-side JavaScript. Errorception - Painless JavaScript Error Tracking. Honeybadger. Bugsnag • real-time bug intelligence. Exceptional: an exception tracker for web apps. Squash: The open-source bug-smashing tool. Whoops. Airbrake: The app error app. Errbit/errbit.