Figure design from Aaron Diaz

Not really semantic programming, but ... Aaron Diaz (of Dresden Codak authorship fame) talks about figure design for cartooning, and for me, cartooning is inherently a visual semantics and programming thing.  Your mileage definitely varies.

Cmx.io

A cartoon renderer for the generation of XKCD-style comics.

BonsaiJS

BonsaiJS is a very neat SVG renderer that runs in the browser in JavaScript.

That, my friends, makes Toonbots a whole new ballgame.  I need to revisit the Toon-o-Matic.  Seriously.