Initially I just wanted to have a small blog for my travel pictures. But as most blog software I tried is a pain in the ass, I wrote my own blog software. It is based on NodeJS, CouchDB and some node libraries. The Interface is made with Twitter bootstrap and some CSS magic.
My blog engine has two big advantages over Wordpress: Speed and simplicity. There's 5 different kind of "segments" which can be used to form a blog post: Text, html, images, thumbnails (images in a grid) and http links.
Furthermore all images are always visible in a nice lightbox and it is possible to attach binary files to a blog post.
All data related to a blog post are stored in a single CouchDB document. This leads to easy data management and very fast response times.
When I come up with a good name for my little blog engine I will make it available as open source project on Github.