Originally created by http://hanno-rein.de/archives/349, this is various latex libraries to produce coffee stains, similar to https://github.com/bae43/LobLib/.
The original coffee latex package.
Improved version that works with pdflatex by Evan Sultanik.
Allows for scaling, rotating, and changing the opacity of the coffee stain, by Professor Luis Randez.
Allows for off center coffee stains, by Adrian Robson.