Have my own blog software, YBlog: http://blog.fdik.org/yblog2.tar.bz2 Probably it's not feasable for most people, because it is heavily relying on YML2 http://fdik.org/yml and vim http://vim.org

For CMS I really can recommend http://mezzanine.jupo.org/

It also includes a Blog, is in Python/Django and is fulfilling all needs from very small to very large sites.