foxBMS is a free, open and flexible development environment to design battery management systems. It is the first modular open source BMS development platform.
A current build of the documentation of this project can be found here:
The project changelog is found in docs/general/changelog.rst.
The license information of the project is found in LICENSE.md.
Basically, the software is covered by the BSD 3-Clause License (SPDX short identifier: BSD-3-Clause) and the hardware and documentation by the Creative Commons Attribution 4.0 International License (SPDX short identifier: CC-BY-4.0).