I just finished the creation of KiCad footprints for the Core, the Photon and the Electron:
This is in the new
.pretty format that can be imported directly from Github into Kicad, if you use the development version of KiCad. (The stable version is pretty outdated, from 2012 or so.)
The footprints have been created manually, not through an Eagle converter or something like that. (It’s actually pretty easy to edit them manually using a text editor, they’re just text files containing some kind of S-expressions. Units are in mm.)
The license is MIT, feel free to use them however you like. Or let me know if the license doesn’t fit your use case.