Lair of the Uber Geek has an article on modeling mud. The key ingredient is liquitex modeling pasted. I have used this myself to great effect.
Tournament Joust
Tournament Joust is a free print and play game with some really good looking jousting mechanics. It has paper knights, but you’ll want to swap in your own miniatures.
Dr. Who Adventure Game
The Dr. Who Adventure game is a fan created cooperative adventure game.
Recovering Paints
Here’s an interesting use of an ultrasonic bath to recover paints that have separated.