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).
Expressive middleware for node.js using generators via co to make web applications and APIs more enjoyable to write. Koa's middleware flow in a stack-like manner allowing you to perform actions downstream, then filter and manipulate the response upstream.
Extending the art & spirit of PHP, Zend Framework is based on simplicity, object-oriented best practices, corporate friendly licensing, and a rigorously tested agile codebase. Zend Framework is focused on building more secure, reliable, and modern Web 2.
Backdrop CMS is a simple, lightweight, and easy to use Content Management System used to build attractive, professional websites. Use it for everything from a single-administrator's personal blog site, to a complex, multi-role, business e-commerce platform.
PHPixie is a modern component-based PHP 7 framework. It is thoroughly tested with high code coverage and provides blazing performance without sacrificing any features. All PHPixie components can also be used standalone and provide a great foundation.