Amon - Server monitoring, simplified logging and error tracking for web apps
Amon is a self-hosted, lightweight web application and server monitoring toolkit. It provides you with straightfrorward visualisation of essential server data. It helps you manage the errors that occur in your web applications and makes logging complex datastructures and searching in your log data easy.
Enyo JavaScript Application Framework
Enyo is an open source object-oriented JavaScript framework emphasizing encapsulation and modularity. Enyo contains everything you need to create a fast, scalable mobile or web application: