Libraries for freestanding C++ development:
- https://github.com/osdev0/freestanding-cxx-hdrs-gnu
- https://github.com/etlcpp/etl
- https://github.com/managarm/frigg
- https://github.com/teslamotors/fixed-containers
- https://github.com/Bareflank/bsl
Not freestanding, but interesting: