Zap is a project mainly written in PHP and JAVASCRIPT, it's free.
A fork of the Swat project to remedy some performance issues, add unit tests, and integrate with Zend Framework components
Zap is a fork of the Swat library from silverorange. It aims to address a few architectural issues in Swat that cause poor performance on complex interfaces and to provide tighter integration with Zend Framework.
Zap allows you to build web application user interfaces with simple reusable components. It handles client-side dependencies, markup generation, messaging and validation, making many tedious web development tasks more straightforward.
The fork is in the very early stages. The focus right now is on adjusting the coding style of Swat to reflect the Zend Framework standards and providing unit tests to provide safety during major refactoring of the library.
Zap will change the way that the SwatMessage and SwatHtmlHeadEntry APIs function to avoid the slow recursive calls currently needed to track messages attached to widgets and client-side CSS and JS dependencies.
Zend_Cache will be integrated throughout the codebase to allow for more
cohesive caching of slow tasks like escaping large numbers of flydown entries
or rendering complex data tables.
Once the PHP fork is stable and a broad range of widgets are fully functional, we will look into porting the current YUI 2 based Javascript that ships with Swat.
For the initial proof of concept, we're working to convert SwatForm, SwatFrame, SwatEntry, and their dependencies.
Contributions to the project are definitely welcome. Please provide unit tests
for all files you've ported and check your contributions with the included Zap
PHP_CodeSniffer standard.