GNU General Public License (GPL)

  setup.py
  bin/bbimage
  bin/bitbake
  lib/bb/fetch/*
  lib/bb/parse/* (except parse_c/ which is not built)
  lib/bb/*
    (except COW.py, which has no license, and methodpool.py,
    which is under the BSD license)

3-clause BSD License

  lib/bb/methodpool.py

MIT License

  bin/bitdoc
  classes/base.bbclass
  conf/bitbake.conf
  contrib/vim/syntax/bitbake.vim

CC BY 2.5

  doc/manual/usermanual.xml

Licence Art Libre - http://artlibre.org/licence/lal/

  doc/manual/html.css

Public Domain

  contrib/bbdev.sh