http://www.blojsom.com/
Blojsom is a java blog platform. Multi-blog, multi-user blogging platform. It powers Apple's Mac OS X Tiger Server Weblog Server.
http://pebble.sourceforge.net/
Pebble is a lightweight, open source, Java EE blogging tool. It's small, fast and feature-rich with unrivalled ease of installation and use. Blog content is stored as XML files on disk and served up dynamically, so there's no need to install a database.
http://roller.apache.org/
Apache Roller is a full-featured, multi-user and group-blog server suitable for blog sites large and small. It powers internal and external employee blogs and Sun, IBM and other companies as well as the JRoller.com Java blogging community.
