Although GRR is licensed under the Apache License 2.0, binary builds of GRR include third party code that have been made available under various licenses.
Python
Project site: http://www.python.org/
For more information on licensing see: http://docs.python.org/2/license.html
pywin32
Python dateutil
Project site: http://labix.org/python-dateutil
Python WMI
Project site: http://timgolden.me.uk/python/wmi/index.html
psutil
Project site: http://code.google.com/p/psutil/
Libprotobuf and Python-bindings
Project site: http://code.google.com/p/protobuf/
SleuthKit
Project site: http://www.sleuthkit.org/
The SleuthKit is mutli licensed * Common Public License 1.0; applies to most of the code * IBM Public License 1.0; applies to the file system code (tsk/fs, tools/fstools) * GNU General Public License 2; applies to srch_strings which should not be included in a binary build of GRR.
Pytsk
Project site: http://code.google.com/p/pytsk/
M2Crypto
Project site: http://chandlerproject.org/Projects/MeTooCrypto
OpenSSL
Volatility
TODO
Distorm
TODO
Yara
TODO
pytz
Project site: http://pytz.sourceforge.net/
PyInstaller
GNU General Public License 2 with an exception for the bootloader, which is the part that is used in GRR binaries.