bishare

BIShare moves files directly between your devices — iPhone, Android, Mac,
Windows, and Linux — over your local network at full speed, end-to-end
encrypted, with no account and no cloud in the middle. When there is no
network at all, QR Beam streams a small file over an animated QR code that
the other device's camera scans.

Features:

• Direct device-to-device transfer over Wi-Fi or a hotspot — no size limit.
• End-to-end encryption (X25519 + AES-256-GCM) with per-file keys.
• Cross-platform, including the direction AirDrop can't do: iPhone ↔ Android.
• QR Beam: send a small file with zero network, screen-to-camera.
• Free and open source (MIT).