VB-Audio Virtual Cable - Connect Audio Applications together with a Virtual Audio Device
AudioBus - With Audiobus, the revolutionary new inter-app audio routing system, you can connect your...
VAcard - [NOTE: You can download the application from ...
Loopback by RogueAmoeba - Get all the power of a high-end studio mixing board, right inside your Mac!
SoundDesk Virtual Devices by LoudLab - SoundDesk Virtual Devices - Software devices to route audio across macOS.
LiveTrax - LiveTrax is an app by MasterMedia Productions through which musicians can control the playback of their favorite track during live performances by using simple controls.