loopMIDI 

Create virtual loopback MIDI ports using drivers. Features a built-in utility to control various port settings, and baud rate.

Sometimes you need to run applications (like sound recorders or music production programs) that require having MIDI ports opened on your system, but this condition cannot be met because of all kinds of reasons (the MIDI ports are used for other tasks, the MIDI ports are not available at all, etc.). In such cases, giving up on your task is not the only way to follow, as you can simply resort to creating and using virtual MIDI ports.

loopMIDI is a tiny app that lets you create and use virtual loopback MIDI ports. In fact, it makes use of the virtualMIDI driver to create the virtual ports, but in addition to the virtual driver, it also offers a handy and neat way to control and configure the ports. You may also tweak advanced settings like the sysex buffer size or the feedback detection value.

Another remarkable advantage of loopMIDI comes from the fact that the ports created with this tool will cease to exist once the app is closed. They'll be up and running only while loopMIDI is also running, so you will be able to avoid having the ports interfere with other apps and creating unwanted situations. Furthermore, the ports are unique for each user.

In conclusion, if you ever need to create and use virtual MIDI ports, you should try this tool, as it's neat, handy, and best of all, completely free.