Blog is a project mainly written in Python, it's free.
My Personal Blog Engine
This is my personal Blog. It runs on http://www.debrice.com
Django DB Log : it logs all the exception in your DB and informs you by email available at (git clone) git://github.com/dcramer/django-db-log.git
Django Mailer : It manage your email and stores them in the DB available at (git clone) git://github.com/jtauber/django-mailer.git
SORL: this library makes it easy to manage thumbnails available at (hg clone) https://sorl-thumbnail.googlecode.com/hg/
django tagging: Tags your data to group them by theme. available at (svn checkout) http://django-tagging.googlecode.com/svn/trunk/
The website design is based on Erwin Aligam work (http://www.styleshout.com) and is distributed under the Creative Commons Attribution 2.5 License. This mean thatyou are free:
The engine (Python source code) is released under the GPL V3 available at : http://www.gnu.org/licenses/gpl.html