I'm not sure but if you find one, suggest adding https://pinecones.lol 😉

Or, if you want to throw together a list, I'll add them to https://nostrlink.net

I prefer to add free services and open source projects but would be willing to make exceptions. I'm working on an overhaul for that domain instead of using LittleLink, so when I finish maybe I'll add lists of paid services as well.