https://github.com/armel/uv-k5-firmware-custom → probably best option right now https://github.com/sq5bpf/k5prog https://github.com/armel/uv-k5-chirp-driver
https://github.com/amnemonic/Quansheng_UV-K5_Firmware
https://github.com/skuep/AIOC → very nice to have