OP: https://www.merriam-webster.com/...

How about PairDrop?

It's even selfhostable!

There's an aggregator run by the founder, as well as some other useful links here (also aviable via http)

There's Technitium DNS, though I'm not an user hence no strong recommendation on my end.

There's Swingmusic and Funkwhale, the former closer to Navidrome, the latter with... nice features (federation, built in library management) and issues (slow development cycle, bugridden Android app).

My pick: https://www.merriam-webster.com/...