Absolutely; I'm using a slightly modified layout myself. Both the design and the firmware(s) are free software: - Design (GPLv3): https://github.com/technomanc

Absolutely; I'm using a slightly modified layout myself. Both the design and the firmware(s) are free software: - Design (GPLv3): https://github.com/technomancy/atreus https://github.com/technomancy/atreus - Current firmware (GPLv2+): https://github.com/technomancy/tmk_keyboard/tree/atreus https://github.com/technomancy/tmk_keyboard/tree/atreus - Older firmware, great for learning (GPLv3): https://github.com/technomancy/atreus-firmware https://github.com/technomancy/atreus-firmware