phpDays is a flexible PHP 5 framework for rapid Web site development. It features an MVC architecture, Ajax support, YAML configuration, database abstraction (MySQL, PostgreSQL, MS SQL, etc.), a good collection of standard models, an excellent quick start guide, and logging to files or firephp.
GreenPants is a simple blog system. The entries are organized with categories. There is an admin panel for managing the blog. Comments on the blog must be approved before being seen by the public. The administrator can edit, delete, and create entries, categories, and emoticons. The entries and the comments are marked up with BBCode instead of HTML. It is easy to translate to another language.
Flixn Media Platform is a collection of Flash-based tools and backend utilities to facilitate the generation of rich Web media, and video in particular. It features components to enable recording from a webcam and/or microphone, uploading and transcoding of video, and feature-rich playback. The platform was designed for mass/virtual deployment.