ContentRoller is an easy-to-configure, set up, customize, and use news, links, and blogging CMS environment that provides you the ability to have your own social news site like Digg, Yahoo Buzz, DZone, The Server Side, InfoQ, Slashdot, etc. ContentRoller can also be configured to look like a newspaper-based news site.
WordBash is a Wordpress clone written in Bash, the GNU Bourne-Again SHell. Everything is generated and output by Bash. No AWK. No SED. No TR. It is all Bash (with one exception). It is a CGI script with an attempt at an OO-like design. It currently supports posts (categories, tags), comments (with spam rejection), themes (true templates), and code highlighting as an administration addon. The current script size is 21 files of about 2500 lines and only 44 kilobytes.
formVista is an advanced LAMP-based content management and business platform designed by an entrepreneur for entrepreneurs. It goes beyond typical content management solutions to help the entrepreneur "close the business loop". It combines a preview publish front end content manager that supports advanced Web 2.0 social networking features with a comprehensive backend customer relationship manager.
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.