Open PostgreSQL Monitoring - Oversee and Manage Your PostgreSQL Servers
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.
Errbit - The open source error catcher that's Airbrake API compliant
CatchJS - Unbloated, yet feature rich. CatchJS provides JavaScript Error Tracking the way it should be.
Redsmin - All-in-One GUI for Redis. Thightly crafted developer oriented, online real-time monitoring and administration service for Redis.
AirBrake - Airbrake is the leading exception reporting service, currently providing error tracking.