Source code at: https://github.com/davidmoreno/rtpmidid
License is LGPL 2.1 (library) and GPL3+.
Has preliminary deb packaging using `dpkb-buildpackage`.
If there is something that I could do to help to package this program,
please contact me (dmoreno@coralbits.com), or add a bug report at github.

Some description:

rtpmidid allows you to share ALSA sequencer devices on the network using
RTP MIDI, and import other network shared RTP MIDI devices.
rtpmidid is an user daemon, and when a RTP MIDI device is announced using
mDNS (also known as Zeroconf, Avahi, and multicast DNS) it exposes this
ALSA sequencer port.