Bit 5 Blog
Home page: www.postnuke.com
License: Creative Commons
Implementation: PHP, MySQL (ADOdb)
Description: News-oriented content management system. Built from modules (including many 3rd party, often inconsistently implemented), organized by blocks, with an extensive selection of themes. The most developed module is for handling news stories. Stories can be grouped under topics, and readers can add comments. Static pages can be stored in sections. Separate modules are available for calendar, photo gallery, bulletin boards, etc.
Reference Sites: ACLUG.
Page layout is organized by blocks, attached to modules. Layouts are themeable, and there are a substantial number of themes available.