This may be useful for some of you, both as a live monitoring and studio troubleshooting tool:
https://github.com/gbevin/ShowMIDI
Note that unlike MIDI-OX and other tools, parameters don't stay visible permanently. However for complex displays (monitoring an entire performance or etc) this may actually be preferable. They just updated this tool with new light & dark themes, customize colors ability and a free iOS app as well: https://apps.apple.com/us/app/showmidi/id6472608850