Сегодня это поход по 
http://sourceforge.net/ в поисках чего-нибудь интересного на тему PHP:
http://sourceforge.net/projects/vallheru/ – Its turn based, web-browser, fantasy MMORPG written in PHP and MySQL (but may work with many other databases) with Smarty Template Engine, ADOdb and PHP Mailer. Based on Gamers-Fusion ver 2.5 with many modyfications in security, speed and features
http://sourceforge.net/projects/mantisbt/ – Mantis is an easily deployable, web based bugtracker to aid product bug tracking. It requires PHP, MySQL and a web server. It is simpler than Bugzilla and easily editable. Check out the online Demo.
http://sourceforge.net/projects/phpdocu/ – A complete documentation solution for PHP. Generates javaDoc-style API documentation and user-level manuals from your PHP code. Теперь документация к ядру QS генерируется именно с помощью этой штуки
http://sourceforge.net/projects/magpierss/ – MagpieRSS is a simple, functional PHP inteface for parsing RSS 1.0 (and earlier versions). Built on PHP's XML (expat) parser, and with an integrated cache for storing the parsed RSS objects, Magpie is designed by simple, and 'PHP-like' to use.
http://sourceforge.net/projects/atutor/ – ATutor is an Open Source Web-based Learning Content Management System (LCMS/LMS), designed with accessibility and adaptability in mind. Interoperable content packaging for creating and reusing learning objects. Easily customizable, and well supported. Интересно, в сайт включен какой-то Speech Engine, правда, на Quick Time
http://sourceforge.net/projects/sapid/ – Fully-featured CMS for SOHO sites
http://seagull.phpkitchen.com/?ref=sf – Seagull is an object oriented framework written in PHP that focuses on best practices, clean code and reusable components.
http://sourceforge.net/projects/openrpg/ – OpenRPG is an Internet application that allows people to play Role Playing Games and some miniature based war games in real-time over the Internet. OpenRPG helps facilitate character tracking, miniature battles, and adventure building.
http://sourceforge.net/projects/phpmybackup/ – phpMyBackupPro is a web-based MySQL backup program in PHP. You can schedule backups, download, email or upload them with FTP and also backup file directories. Zip and gzip compression. Easy interface and installation. Many languages and online help.
http://sourceforge.net/projects/siteatschool/ Site@School is a CMS specially for primary schools. Many modules: eg. homepages for pupils, intranet for teachers, access management, email alerts and much more. Languages: EN, ES, PT-BR, NO, DE, DK, SE, GB, JP, NL, FR, FI, TR, PL, IT, BG.
http://sourceforge.net/projects/phpthumb/ – PHP thumbnail generator. Optional resizing, cropping, watermarking, unsharp mask sharpening, rotating, caching, borders. GIF reading with/without GD support. EXIF thumbnails can be extracted and/or used for large-source support. Works with any GD version
http://sourceforge.net/projects/phpxmlrpc/ A PHP implementation of the XML-RPC web RPC protocol.
http://sourceforge.net/project/phpscribe
http://sourceforge.net/projects/phpautodoc
http://sourceforge.net/projects/dephicodetodoc
http://sourceforge.net/projects/phpdoctor
PHP IDE: