Robin Gareus http://gareus.org/
7 Pedalboards using it

MIDI Note Toggle

Plugin screenshot
Utility MIDI

With MIDI Note Toggle, play a note to turn it on and play it again to turn it off. Features: Modeled by x42

Control Default Min Max
Filter Channel 0 0 16
latency 0 0 192000
http://gareus.org/oss/lv2/midifilter#notetoggle v.1:1033.31-12