DotClear is a neat blogging platform. Since DotClear 2, it is a multi-blogs platform, really suited for enterprise blogging. Developped by a french community, DotClear still lakes the support of a strong english speaking community.
A semantic personal publishing platform with a focus on aesthetics, web standards, and usability.
b2evolution includes all the features of traditional blog tools, and extends them with evolved features such as file & photo management, advanced skinning, multiple blogs support as well as detailed user permissions…
LifeType is an open-source blogging platform with support for multiple blogs and users in a single installation.
Movable Type is an enterprise grade blogging software.
A blog software which resides on your webserver. Includes multiple blog capabilities and RSS syndication.
Drupal is an open-source platform and content management system for building dynamic web sites offering a broad range of features and services including user administration, publishing workflow, discussion capabilities, news aggregation, metadata functionalities using controlled vocabularies and XML publishing for content sharing purposes. Equipped with a powerful blend of features and configurability, Drupal can support a diverse range of web projects ranging from personal weblogs to large community-driven sites.