I hope against hope that this is real.

StrokeDB is an embeddable distributed document database written in Ruby. It is schema-free, it scales infinitely, it even tracks revisions and perfectly integrates with Ruby applications
Not an RDBMS, but simpler to use.

An implementation of the “true” utility in unix that is nothing but a copyright notice. The copyright notice effectively copyrights itself. Also note: this is version 1.6! I hope the change log is just full of deletion statements.

Vimperator is a free browser add-on for Firefox, which makes it look and behave like the Vim text editor. It has similar key bindings, and you could call it a modal web browser, as key bindings differ according to which mode you are in.
Not for the faint.