[scq]

https://snapdrop.net works pretty well if you're on the same Wi-Fi network.

[chrisseaton]

Not having to be in the same WiFi network is part of the whole point of AirDrop is it it?

[spullara]

AirDrop uses a sidechannel wifi network that doesn't expose the transfer to anyone else.

[vetinari]

Samsung devices support WiFi Direct, so you don't have to be on the same wifi network to send/receive files and the solution is standards-based.

In theory, other Android devices support WiFi Direct too, maybe they just don't ship userspace apps for that, like Samsung does.