Ehec
This month's exquisite contribution is a... bacterium, also known as E. coli. Why is this an exquisite contribution? Well, Hummel (the author) didn't post the actual bacterium, but the code for a shader that puts it into perspective - see for yourself:
How is this contribution useful for our projects, once again? Well, I can see this shader being used for the walls in one of your cave levels; I'm sure that you will be able to come up with several other interesting ideas. Trust me: the shader looks even better in the demo, so don't forget to check it out, and then go and thank Hummel for his great contribution.