K2F is described as 'Yet another PHP framework? Yes, but with a twist. This framework doesn’t focus on a specific methodology or paradigm (eg: MVC), but on getting things done quickly and the way you want' and is an app in the Development category. There are more than 25 alternatives to K2F for a variety of platforms, including Linux, Mac, Windows, Online / Web-based and Self-Hosted solutions. The best alternative is Django, which is both free and Open Source. Other great apps like K2F are Laravel (Free, Open Source), Ruby on Rails (Free, Open Source), Symfony (Free, Open Source) and CodeIgniter (Free, Open Source).
Bitweaver is a free and open source web application framework and content management system. Its speed and power are ideal for large-scale community websites and corporate applications, but it is simple enough for non-technical small site users to set up and administrate.
Briz is a simple but powerful PHP framework for creating web applications.You can Write powerful web applications with multiple faces. It is efficient for creating anything from simple API to Large web applications.