Smarty is a template engine for PHP. More specifically, it facilitates a manageable way to separate application logic and content from its presentation.
moregroupware is another web based groupware. It contains modules like contact management, webmail, calendar and some more and it will be extended day by day.
XOOPS is a dynamic OO (Object Oriented) based open source portal script written in PHP. XOOPS is the ideal tool for developing small to large dynamic community websites, intra company portals, corporate portals, weblogs and much more.
inTouch is a simple webbased multi-user addressbook/guestbook system, which is powered by PHP/Smarty and mySQL. Multiple users (e.g. school classes) can save their addresses in it, so the users are able to lookup the addresses of each other.
UebiMiau is a simple, yet efficient cross-plataform POP3/IMAP mail reader written in PHP. It's have some many features, such as: Folders, View and Send Attachments, Preferences, Search, Quota Limit, etc. UebiMiau DOES NOT require database or extra PHP modules (--with-imap)
Pearlowis allows customers to reconfigure items in a shopping cart on the fly without ruining profit margins. A fourth-generation administrative interface is key, and speed is a prime concern. The SMARTY template engine is used for most of the display.
PHP Bookmarks/Favorites and contacts management (and other stuff). Booby is a multiuser, multilanguage, fully themeable web-based desktop application which provides online management for bookmarks/favorites, contacts, todo's, notes and news feeds.
Booby is based on a generic MVC design pattern. This pattern is based on items with a potential hierarchical relationship.