# License Portapack Mayhem is distributed under GPL v3.0, however some sub projects might have different (GPL v3.0 compatible) licenses. ## Other Licenses (compatible with GPL v3.0) - Most of Portapack Mayhem is distributed under GPL-2.0-or-later. [license](LICENSE.GPL-2.0-or-later) - ChibiOS is distributed under GPL v3.0. [license](/firmware/chibios/license.txt) - Portapack-ChibiOS is distributed under Apache-2.0 [license](http://www.apache.org/licenses/LICENSE-2.0)