AsyncBluetoothA small library that adds concurrency to CoreBluetooth APIs.
GATTBluetooth Generic Attribute Profile (GATT) for Swift (Supports Linux)
SwiftyTeethA simple, lightweight library intended to take away some of the cruft and tediousness of using CoreBluetooth
coBlueUse Bluetooth Low Energy for remote commands, file transfer, Based on bluez Bluetooth protocol stack (BLE Terminal)