[dhruvmittal]

Magic Wormhole [1] also exists.

[1] https://magic-wormhole.readthedocs.io/en/latest/

[ori_b]

And for a web native version, there's also WebWormhole: https://webwormhole.com/

[rickydroll]

Syncthing [1] also exists

[1] https://syncthing.net/

[jjcob]

Syncthing is for syncing folders like Dropbox

It's not a good solution to send individual large files.

[jszymborski]

Is there something like a Magic Wormhole server, so I can e.g host a file on my NAS (behind a NAT) for download long term?

[ch71r22]

also Keet: https://keet.io/