HyperBK (Hyper Berkeley Kernel)

HyperBK (Hyper Berkeley Kernel), a BSD descendant kernel with GPL-compatible licenses preserved, non-compatible ones removed, and new code written under GPLv3.

Licenses for logotype and character:

• HyperbolaBSD™ logotype image 2017/05/12
  by André Silva, Márcio Silva and José Silva is under the terms of either:
  Free Art License version 1.3,
  Creative Commons® Attribution-ShareAlike 4.0 International License or
  GNU® Free Documentation License version 1.3 with special exceptions.

• Hyper Bola🄯 character image 2017/04, 2019/01/22 and 2019/07/10
  by José Silva, Márcio Silva and André Silva is under the terms of either:
  Free Art License version 1.3,
  Creative Commons® Attribution-ShareAlike 4.0 International License or
  GNU® Free Documentation License version 1.3 with special exceptions.