Zanshin
Trolljegeren
If you don't need more than 4x4:
This thing will pat your head and rub your belly for you. I really don't want to fight @jononotbono, you look dangerous
Midihub – MIDI Interface & Stand-Alone MIDI Processor
Midihub is a stand-alone MIDI event processor, router & MIDI interface. Using the Midihub's Editor you can set it up to process MIDI messages in any way you want!
blokas.io
This thing will pat your head and rub your belly for you. I really don't want to fight @jononotbono, you look dangerous