phpMyFiction is a fanfiction publishing software, designed to easily create fandom related fanfiction sites, although it could be probably used to do other things as well. The name kind of says it all: It's based on php and MySQL.
While you can easily create small sites for a small fandom page like this one, you can also use it to create something bigger like, for the lack of a better comparison, FanFiction.Net. But that would require quite a bit experience with running large dynamic websites on your part.
The current skin (layout) creates large amounts of HTML output, that could be reduced in order to decrease bandwidth usage.
Extra Features - Unlimited Categories (Subcategories) - In Chapter Bookmarks - Review Reward System - Character and Relationship support - Author Application System - FAQ System - Fanfiction Banner Support - Caching - PDF download of fanfictions/chapters - Printer Friendly fanfictions/chapters - Online Creation/Editing of Chapters - Smiley enabled reviews - Series Support - Fanfiction/Chapter Statistics - Upload MS Word (*.doc) chapter files (requires wvWare) Actually, you can integrate all kind of conversion tools, it's just a matter of detecting mime-types and your server administrator installing the tools :-)
General Features - Reviews - Review Alerts - Author Feedback - Feedback Alerts - Rating