Bootstrap material design has something similar, although it is not matured yet:
https://github.com/FezVrasta/bootstrap-material-design
It's effectively CC BY-SA-NC which is rather bold when you consider that it's adopting a design framework from Google for a css framework from Twitter.
[0] https://github.com/FezVrasta/bootstrap-material-design/blob/...
[1] https://github.com/FezVrasta/bootstrap-material-design/searc...
> There will be a commercial license as well. [0]
Well, if he goes that far, perhaps Google or Twitter lawyers will finally put an end to this.
[0] https://github.com/FezVrasta/bootstrap-material-design/issue...