Update - 2019-04-05:
This design is released under the Creative Commons Attribution 4.0 International.
This design is released by http://muffsy.com for personal, non-profit use only. Group buys, where the aim is to cover the cost of producing and shipping the boards are generally okay. Feel free to send me a note if that is the case and I will even cover it here on the blog. I would also love to cover your ongoing or finished project. I do not take on any responsibilities for anything other than distributing the PCB design files. Anything that happens after downloading these files, like during etching, ordering or assembling the PCB is entirely your own responsibility. A bill of materials will not be presented, as the whole purpose of this board is to let you choose your own components.