There are lots of others, but most either shut down, got turned into scams, or were always scams.
There was one chat app I remember, I think it was called firechat or something. They ended up removing all the P2P features from it and removed all references from their advertising.
Yggsrqsil network I2P Freenet https://en.wikipedia.org/wiki/B.A.T.M.A.N. IPFS SSB / Manyver.se / PZP Briar Project Tailscale Syncthing Localsend
There are lots of others, but most either shut down, got turned into scams, or were always scams.
There was one chat app I remember, I think it was called firechat or something. They ended up removing all the P2P features from it and removed all references from their advertising.