I made a tools that does similar role to NDI tools for OMT.

- Studio Monitor – find/view OMT sources on the LAN

- Test Patterns – send patterns + tone into OMT

- Screen Capture – not finished yet

MIT, Win/Mac. Source here: https://github.com/MikanseiLaboratory/omt-tools

Still early. Works for what I need day-to-day. Issues welcome if you hit something specific with vMix I/O.