Aleph Objects, makers of the LulzBot brand of desktop 3D printers and parts announced a partnership with IC3D to develop the first open source filament. The main goal is to democratize manufacturing.
The filament is Open Source Hardware Association (OSHW) certified.
Video of the talk at the 2017 Midwest RepRap festival:
GitHub repository with filament specifications and other materials:
Lulzbot is also selling the filament at 35USD per 1kg spool:
Source news release: