To assist you in finding bloggers using the same blog platform as you.
Dotclear is an open-source web publishing software published in 2003 by Olivier Meunier. A one man's project at first, Dotclear soon gathered a team comprising different personalities with various backgrounds. The project's purpose is to provide a user-friendly tool allowing anyone to publish on the web, regardless of their technical skills.
Facebook is a social networking platform that allows you to connect and share information with your friends, family, co-workers, and other acquaintances. A blog is a form of journal on the Internet that allows you to write posts and entries about your life, hobbies, opinions, and other topics that interest you, that's why Facebook personal pages fall under blog platforms.
Geeklog is an open source application for managing dynamic web content. It is written in PHP and supports MySQL, PostgreSQL, or MS SQL as the database backend. "Out of the box", Geeklog is a CMS, or a blog engine with support for comments, trackbacks, multiple syndication formats, spam protection, and all the other vital features of such a system.