Do you want us to add PivotX to the Bitnami library? You can vote for it on our wishlist.
PivotX is an open source blog software written in PHP using either flat files or a database to store content. It uses the Smarty web template system and the TinyMCE editor. One installation can handle several blogs, each with its own configuration, including themes. Users belong to different levels regarding managing and editing privileges. New functions can be added via extensions managed through the admin interface.