Smarty is a template engine for PHP. More specifically, it facilitates a manageable way to separate application logic and content from its presentation.
TouchGraph provides a hands-on way to visualize networks of interrelated information. Networks are rendered as interactive graphs, which lend themselves to a variety of transformations. By engaging their visual image, a user is able to navigate through large networks, and to explore different ways of arranging the network's components on screen.
This is the most popular DHTML Calendar. It can work as a popup calendar or a flat calendar (flat means it's always displayed in page). It works with Mozilla, Netscape >= 6.0, all other Gecko-based browsers, Internet Explorer >= 5.0 for Windows, Opera 7, Safari and Konqueror.
PHP Layers Menu is a hierarchical dynamic menu system that allows to prepare "on the fly" dynamic HTML menus relying on the PHP scripting engine for the processing of data items.