Please post here if you want to submit an engine. Include:
Type of engine
Software it's meant for (MMF2, TGF, KNP, Construct (2), etc)
And please get permission from the author before posting a link. If you find a website with several links, that's fine, I'll get into contact with the creator of the engine.
Disclaimer: Any sarcasm in my posts will not be mentioned as that would ruin the purpose. It is assumed that the reader is intelligent enough to tell the difference between what is sarcasm and what is not.