[aspenmayer]

Here’s some apps that actually implement AirDrop, because I believe in truth in advertising! (I can’t be the only one, right?):

Linux (seems currently maintained) https://github.com/seemoo-lab/opendrop

Android (discontinued January 2023, may have compatibility issues, but still, actually compatible with AirDrop) https://github.com/MoKee/android_packages_apps_WarpShare