Pebble parece ser o que você precisa:
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.
Conteúdo
* Posting and management of content through your web browser, including rich text editor support.
* Blogger and MetaWeblog API interface included for posting content via compatible tools.
* Categorisation of content into multiple hierarchical categories.
* Tagging of content and a generation of a tagcloud.
* RSS enclosures for distributing files or podcasting.
* Pinging websites via XML-RPC when new blog entries are added.
* Link to your favorite social bookmarking site
Respostas do leitor
* Reader responses, in the form of threaded comments and MovableType TrackBacks.
* E-mail notifications when new responses are received.
* Pluggable moderation, spam detection and CAPTCHA support.
* Bulk response management features to approve/reject/remove comments and TrackBacks.
O Pebble usa as seguintes tecnologias
- Java
- Páginas JavaServer
- Biblioteca de tags padrão JSP
- Java Servlets
- Sistema de segurança Acegi para a primavera
- Primavera
- Apache Lucene
- Jakarta Commons
- Apache XML-RPC
- Radeox