WordPress, official successor of b2\cafelog, is an open source blog publishing application. It has become one of the most popular CMS‘s right now, as well as Movable Type. The main reasons for its success are its enormous growth, its GPL license, and its simplicity.
The name WordPress was suggested by Christine Selleck, a friend of lead developer Matt Mullenweg. And continuing with the curiosities, we have to remark that each WordPress version launched has been called like famous jazz musicians (Mingus, Strayhorn…).