A simple, custom framework that powers several of my personal sites, including a blog, lifestream, and waterfall directory.
This is an ancient codebase (started back in 2008) that has somehow survived multiple half-rewrites and changing coding preferences. The original intent was to send all requests - static, dynamic, and server-side - through a single point to make easy bootstrapping. Oh, and to support many different types of websites through a single MVC directory.
Shame-driven development. Read more on my blog post.