Test-zf-theme is a project mainly written in PHP, it's free.
Testing Themes
playground project! trying to implement http://blog.fedecarg.com/2009/09/20/adding-theme-support-to-your-zend-framework-application/ in response to http://www.zendcasts.com/forum/post/1029/#1029
recommended changes: place themes/[themename]/templates outside of the public directory