Developer Geert Bevin (LinnStrument software, MPE, Moog Model 15 for iPad) has released SendMIDI, a multi-platform command-line tool for MIDI.
SendMIDI is designed to make it easy for terminal-savvy users to send MIDI messages from a computer to MIDI devices.
“This tool is mainly intended for configuration or setup through Continuous Control, RPN and NRPN messages,” notes Bevin, “but many other MIDI messages can be sent.”
SendMIDI is available as a free download for Linux, Mac & Windows from github. It’s released as an open source project (GPL 3.0).