GNU Linux-libre is a project thats maintains and publishes 100% free distributions of Linux, so no commercial (non open-source) software is involved. GNU Linux-libre 4.1 is released, based on the Linux kernel 4.1.
GNU Linux-Libre is a project of the Free Software Foundation of Latin America. And according to GNU Linux-Libre it is suitable for use in Free System Distributions, removing software that is included without source code, with obfuscated or obscured source code, under non-Free Software licenses, that do not permit you to change the software so that it does what you wish, and that induces or requires you to install additional pieces of non-Free Software.
The developers of GNU Linux-libre love to “deblob” several components as the release info shows.
This release contains deblobbed nxp-nci and btbcm. Updated deblobbing of Intel SST, btusb, elants_i2c, iwlwifi, and various other frequently-updated blobnames.
Read more about this project here (including download links).