Saint CMS is a combination CMS and eCommerce package built atop a rapid development framework. It is high performance, easy to use, and provides convenient tools for creating sites with custom content types. It includes a built-in blog, an image gallery, a slideshow, a file manager, a shop with downloadable product options, an event logging system, a WYSIWYG editor, and more.
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.
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.
Xpostulate is a blog/microblogging client that posts to Livejournal, InsaneJournal, IziBlog.net, DeadJournal, Scribbld, Inksome, Wordpress, and DreamWidth. It can tweet to twitter.com and dent to identi.ca so that you can announce new articles. This is all done via one interface, saving your login information for each, and thus simplifying cross-posting to your various social networking sites.
Sijio is a fast, high performance, easy to use and fully customizable PHP community script. It is equipped with all necessary professional tools and features to run a full fledged community site. Features include blogs, events, a forum, a gallery, polls, page management, user management, and RSS feeds, customizable Smarty powered templates, WYSIWYG editing of any content, easy picture upload, an unlimited number of attachments, and more. It is completely SEO friendly.