OPT is a template engine for PHP5. The main advantage over both PHP and other template engines are the syntax based on XML and the support for the declarative programming. It means that you can concentrate on what you want to have in the templates, not - how to implement them. The template language features include the template inheritance, a support for building HTML forms, advanced list displaying (column layout, tree rendering, pagination) or multilingual website support. The API is based on the solutions from the popular frameworks which simplifies the integration. The complete ports for Kohana and Zend Framework are under development.