Parrot QA - Automate your bug testing without writing a line of code.
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.
RainforestQA - Insanely simple testing. Create tests for your website in plain English, then run them across all major browsers with a single click. Powered by human intelligence
CatchJS - Unbloated, yet feature rich. CatchJS provides JavaScript Error Tracking the way it should be.
Bugfender - Cloud logging for your apps, not only crashes matter
AirBrake - Airbrake is the leading exception reporting service, currently providing error tracking.