Koala Framework is easy to use, fast, and an open source, framework for web applications and websites. It is built on top of a solid base: Zend Framework and ExtJS. Just like in the case of Zend Framework, you can only load and use certain portions of the framework that will be necessary for your unique case use. The good thing with Koala Framework is that it’s easy to use.- This helps in making writing smart applications as simple as possible. It comes along with a CMS on which you can create desktop like apps using Zend Framework and ExtJS.