b2evolution

b2evolution is probably the most comprehensive blog engine you can find! It includes almost any feature you could expect from a blog tool, and more !

Homepage: http://b2evolution.net/
Disk Space: 7.8 MB
Documentation: http://b2evolution.net/man/index.html
Support Forum: http://forums.b2evolution.net/
License: GPL
Donate: http://b2evolution.net/dev/donations