Hoping that this doesn’t look like I created this thing only to advertise my blog, but you can find some examples for non commercial games on my blog, the Arcane Cache:

https://thunderperfectwitchcraft.org/arcane_cache/

If you have done a non-commercial/underground game, tell me - I’ll check it out as soon as I can and a) give you feedback and b) review it if I think it is good.