At the moment, Dulwich is licensed under the GNU General Public License, version 2 or later. We'd like to relicense Dulwich under the Apache v2 (or later) license, as the GPL is problematic for many free software Python projects that are under BSD-style licenses. See also https://github.com/jelmer/dulwich/issues/153 For reference, a full copy of the Apachev2 license can be found here: https://www.apache.org/licenses/LICENSE-2.0 New contributions to Dulwich should be dual licensed under the GNU GPLv2 (or later) and the Apachev2 (or later) licenses. Contributions made prior were contributed under the GPLv2 (or later) license alone. The following contributors have not (yet) relicensed their code under dual Apachev2/GPLv2: Aaron O'Mullan Alberto Ruiz Andres Lowrie Artem Tikhomirov Brendan Cully Chaiwat Suttipongsakul Chow Loong Jin Chris Eberle Damien Tournoud Daniele Sluijters David Blewett David Pursehouse Dirk Dmitriy Dov Feldstern Gary van der Merwé Hal Wine Hans Kolek Hervé Cauwelier Jameson Nash John Arbash Meinel kwatters Lukasz Balcerzak Marc Brinkmann Martin Packman max Nick Ward Nix Risto Kankkunen Rod Cloutier Ronald Blaschke Ryan Faulkner Ryan McKern Sam Vilain Stefan Zimmermann Takeshi Kanemoto Timo Schmid Travis Cline Yifan Zhang Yuval Langer If your name is in this list and you'd be happy to relicense your contribution under dual GPLv2/Apachev2, then please send me an e-mail (jelmer@samba.org) or a pull request on GitHub removing your name from the list above.