SourcePP test assets.
Most of these assets are copied from Valve games, or are screengrabs of My Little Pony: Friendship is Magic or Brand New Animal. If Valve, Hasbro, or Netflix wishes me to take any files with copyrighted or otherwise protected material down I will comply.
The files that I have created from scratch with no copyrighted or protected material are licensed under MIT according to the license here, and are as follows:
toolpp/fgd/empty.fgdtoolpp/fgd/ideal.fgd
All other assets are provided with the intent that they will only be used to test SourcePP, and they will not be distributed for any other reason.