Jisko is an open-source microblogging application written in PHP.

Ninja Blog is a PHP based blogging solution. Based upon wordpress, Ninja Blog uses text files instead of a database to store data. Ninja Blog has customisable themes, What you see is what you get editing environment, dynamic RSS feed generation, Archives, Categories and a version checker. Ninja Blog also includes tools to upgrade from a previous installation of Ninja Blog or Dayfox Blog.