Beetlecrab Audio Tempera is the most inspiring electronic musical instrument I own. I got it in April, and I’m still finding new ways to use it. It does so much.

Oxi One really is the hardware sequencer to rule them all. Though I’m sure you could get by with a Hapax or Deluge if you don’t mind spending twice as much.

Not a purchase, but Csound has always been an invaluable companion to my music making process. It’s also entirely free and open-source.