Catchjs

CatchJS provides top notch error tracking for software developers who are serious about quality. A tiny, but powerful JavaScript library provides automatic telemetry, so you can be notified when an error occurs in your users' browsers. The error log can include screenshots from when the error occured, and the click trail that lead to the event, which makes reproducing and fixing the bug a breeze. We are serious about providing the best tools to help developers, but do so without tolerating any reduction in performance for the end-user. By following this principle, we have created the smallest error tracking library with the longest feature list.