Banjo is a blogging application with bells and whistles, written using the Django framework. It supports caching and skinning. It is suitable for any blog, but is most appropriate for integration into an existing Django application, such as a Satchmo store or a forum. It supports multiple blogs from one installation, each with their own skin. The blogs can be served from unique domain names, from subdirectories, or from subdomains with equal ease, without special configuration. Trackback and Pingback are supported and you can use standard blogging tools such as Ecto, Mars Edit, or ScribeFire to post to the blog.
Blite is a lightweight blog application with a focus on simplicity and ease of use. It provides the essential features of a blog, including categories, archives, and comments. It can easily be themed by modifying a stylesheet and a few simple templates. Blite pages are fast-loading and validate as HTML 4.01. Comment spam is filtered to a spambox (by the use of blogspam.net), where it can be reviewed and deleted (or published). Blite requires PHP 5.3 (or later) with the sqlite extension, and the xmlrpc extension for comment spam filtering.
Chyrp is a blogging engine designed to be very lightweight while retaining functionality. It has powerful theme and extension engines, so you can personalize it however you want. The code is well-documented, and it has a very strong structure that's loosely based on the MVC design pattern. Chyrp allows importation from several different blogging engines and uses a system called "feathers", which are basically templates for custom posts.
Geeklog is the weblog software that concentrates on performance, privacy, and security. It features Web-based administration, surveys (polls), user-customizable boxes, a friendly administration GUI with a topic manager, an option to edit or delete stories, an option to delete comments, a search engine, backend/headlines generation (RSS/Atom format), calendaring, and much more.
GitBlogger is a small tool that allows you to write blog posts in reStructuredText using an editor of your choice, commit your posts to a git repository, and then have them automatically converted to Blogger blog posts when you push your repository to another repository. GitBlogger handles creating, updating, and deleting Blogger posts in response to changes in the git repository and handles renames in your git repository.
Magento Blog is an extension that provides blog functionality for Magento. It features RSS integrated with the native RSS feed, multi-store RSS, the ability to switch the blog on/off blog for different stores, a latest posts widget, switchable category ID in the blog post URL, a switchable categories menu, tags, and an option to have comments per page.
OpenLaunch is a Web-based content management system that integrates a broad array of services into a single, fully-featured, elegantly designed Web site. The project aims to eliminte the difficulty of integrating multiple systems into a single Web site by implementing a blog, forum, Web pages, wiki, and (coming soon) E-Commerce and support tickets. It is built around the Torpedo Framework, an open MVC framework which includes support for controllers, forms, and a large number of other very useful utilities.