The firmware is distributed under: [GNU General Public License v3 (GPL-3)] (http://www.gnu.org/licenses/gpl-3.0.en.html)
You may copy, distribute and modify the software as long as you track changes/dates in source files. Any modifications to or software including (via compiler) GPL-licensed code must also be made available under the GPL along with build & install instructions.
The schematics, breadboard view and .fzz files for editing are done using Fritzing.org and are distributed under the [Attribution-ShareAlike 3.0 Unported (CC BY-SA 3.0)] (http://creativecommons.org/licenses/by-sa/3.0/)