AIDS (AJAX Image Dump System) is a simple, yet powerful AJAX-based image host system. It's geared toward forum usage, and it generates bb-code for cutting and pasting into forums that support bb-code. It lets people create user accounts to keep track of their pictures, reaccess them later to view stats, delete them, or simply copy the bb-code again.
AldoContent is a lightweight CMS focused on usability and simplicity. It is designed for multilingual Web sites and can have sections with public and private content. It has file management, is extensible with plugins, and uses gettext for localization. Is written in PHP for a MySQL backend.