Pumpa is Free Software, and all of the source code is licenced under the GPL, version 3 or higher.

The Pumpa source code includes codes and graphics from other people:

• The kQOAuth library is copyrighted by Johan Paul and licensed under LGPL 2.1.

• The current (temporary?) Pumpa logo is from the "Fruit and Veggie Inventory" entry to the Liberated Pixel Cup by Joshua Taylor. The logo is copyrighted by the artist and is dual licensed under the CC-BY-SA 3.0 license and the GNU GPL 3.0.

• The sundown Markdown library is copyrighted by Natacha Porté, Vicent Marti and others, and permissively licensed.

Other acknowledgements

• Tim Schumacher contributed several improvements and installer code for Microsoft Windows systems.

• Spanish translation by Laura Arjona, Italian by "Metal Biker", German by Mathias Gebbe, Na'vi by Jessica Tallon, Russian translation by Nikolay Merinov, and Finnish by Timo Kankare.