PlayStation Vita - grooveboxhttps://github.com/intermynd-instruments/psvita-usb-audio-midi48kHzaudioDS-8midisonyusbvita
Novation Launchpad now has a free set of tools in Pd to hack your own controllershttps://github.com/Focusrite-Novation/r_cyclegridlaunchpadmidinovationr_cycle
Novation’s Launchpad 2.0 adds widgets that adapt to your DAW shortcuts, expands customizationhttps://novationmusic.com/en/componentsgridlaunchpadmidinovation
Modal MIDI KeyboardNever play a wrong note with this custom scale polyphonic keyboard. https://learn.adafruit.com/modal-midi-keyboard/build-the-modal-midi-keyboardkeymidipythonraspberrypiRP2040
Deluxe 4x4 KeypadBuild a highly posh keypad with aluminum enclosure https://learn.adafruit.com/deluxe-4x4-neopixel-neokey-keypadadafruitkeymidineopixelpad