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.
Coq au Vin is a blogging engine written in Chicken Scheme. It is designed to appeal to users who have basic Web development skills (i.e., who know HTML and CSS), are able to install their own server-side software, and would rather edit a template than press 105 buttons to customize their sites.
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.