Andrew Huang shared this video demo of the Intellijel Plonk Physical Modeling Percussion Synthesizer. 

The Plonk module was developed in conjunction with Applied Acoustics Systems — creators of Tassman, Lounge Lizard, String Studio, Ultra Analog and other plugins. 

The Plonk module focused primarily on creating percussive sound. It does this by modeling two elements — the exciter and the resonator:

• The exciter is a mathematical model of the device used to strike a particular surface. Plonk, because its percussion oriented, has two types of exciters: one modeled on a mallet, and the other providing a noise source.
• The resonator is a virtualization of the object being struck, which vibrates, resonates and creates the body of a sound. Plonk offers several types of resonators: beam; marimba; drumhead; membrane; plate; and string.

Details on the Plonk are available at the Intellijel site.