Kaleidoscope

This is incredibly cool. One place I could see it being super useful is in making it easier to write regression tests for Arduino code. I'm one of the developers of https://github.com/keyboardio/Kaleidoscope - We've ended up putting together a 'virtual' Arduino core (https://github.com/keyboardio/Kaleidoscope-Bundle-Keyboardio...) that compiles to native code, so that we can run a simulator and test suites with gtest and gmock. (https://github.com/keyboardio/Kaleidoscope/tree/master/testi... / https://github.com/keyboardio/Kaleidoscope/runs/1632368671?c... ) It's super-useful, but a browser-based sim might be even better for this.

See also https://github.com/keyboardio/Kaleidoscope

Keyboard.io is one of the nicest pre-built ones. You can fully customize the layout of the Keyboard.io and get blank keycaps https://community.keyboard.io/t/whats-the-latest-info-on-key... You can get a barely used one for ~250 just watch their forums. I've got one 1-2 months ago after playing with a Kinesis. The keyboard is really nice. The firmware and software ecosystem around it is powerful but still lacks usability (you write plugins in C although they have a really nice graphical interface to configure it). https://github.com/keyboardio/Kaleidoscope

The Keyboardio is fully open source, from the schematics to the CAD files to the firmware. It says so several times on the kickstarter page. Heck, the code is available right now: https://github.com/obra/KeyboardioFirmware/

Err, what? Their open source policy is stated in the video and in the text. Every keyboard ships w/ a screwdriver and the firmware is on github. https://github.com/obra/KeyboardioFirmware "We believe, quite strongly, that you own the things you buy from us. You are 100% welcome to open your keyboard up, flash its firmware, reflash its bootloader, solder weird connectors onto the circuit boards or flash our firmware onto something else. (Do note that we're not going to be able to help you out a lot after you do some of those things.) To make all of this as easy as possible for you, your Model 01 will ship with a screwdriver, firmware & bootloader source code, schematics, and all the CAD you need to design your own enclosure."