Koseven is described as 'elegant, open source, and object oriented HMVC framework built using PHP7, by a team of volunteers. It aims to be swift, secure, and small. Forked from Kohana and updated to work with PHP7' and is an app in the Development category. There are more than 25 alternatives to Koseven for a variety of platforms, including Windows, Linux, Mac, Online / Web-based and Self-Hosted solutions. The best alternative is Django, which is both free and Open Source. Other great apps like Koseven are Laravel (Free, Open Source), Ruby on Rails (Free, Open Source), Symfony (Free, Open Source) and CodeIgniter (Free, Open Source).
Django is a high-level Python Web framework that encourages rapid development and clean, pragmatic design. Built by experienced developers, it takes care of much of the hassle of Web development, so you can focus on writing your app without needing to reinvent the wheel.
Nette Framework is a popular tool for PHP web development. It is designed to be the most usable as possible and is definitely one of the safest one. It speaks your language and helps you to easily build better websites.