Plume CMS: Here is another CMS system brought to my attention. It uses PHP and MySql. With a single installation of Plume you can have multiple websites, file management, multiple authors with different rights and websites in any languages thanks to a full utf-8 support. Plume CMS proposes a flexible plugin infrastructure to extend it and is fully accessible with output providing standard compliant code by default. There are some screenshots available and they look a lot like Blogger in many ways. Thanks Michael!