toto is a git-powered, minimalist blog engine for the hackers of Oz. The engine weighs around ~300 sloc at its worse. There is no toto client, at least for now; everything goes through git.
I fork the project and added support to jruby, see https://github.com/vertigem/toto
More info [pt-BR]: http://www.vertigem.xxx/2013/05/14/toto-em-jruby/