SingularCore is described as 'fine product powered by Zend Framework that provides instruments to create complex custom solutions where standard CMS’s won’t work or where you need too much customization in popular engines'. There are more than 10 alternatives to SingularCore, not only websites but also apps for a variety of platforms, including Windows, Linux, Mac and Self-Hosted solutions. The best alternative is Laravel, which is both free and Open Source. Other great sites and apps similar to SingularCore are Symfony (Free, Open Source), CodeIgniter (Free, Open Source), CakePHP (Free, Open Source) and Agile Toolkit (Free, Open Source).
Agile Toolkit is a PHP framework for developing Web User Interfaces. Inspired by desktop GUI it provides a full object-oriented foundation for Business and Presentation logic of your web software. Agile Toolkit is notable for it's simple of use and development efficiency.
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.