BugHerd - BugHerd: The Website Feedback Tool for Agencies
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.
Bugfender - Cloud logging for your apps, not only crashes matter
CatchJS - Unbloated, yet feature rich. CatchJS provides JavaScript Error Tracking the way it should be.
Bird Eats Bug - Saw a bug? Send an instant replay to engineers. It will come with console logs and everything. Developers will ❤️ you.
ErrLytics - Javascript error reporting and performance monitoring tool