Earlier this month, there was some talk of the "free software company" and what that might mean.
I work in an interesting variant of this concept, namely in a company (the Danish company Magenta, see magenta.dk) which, according to its mission statement, may only deliver software under an OSI-approved license, practically speaking either GPL or LGPL version 3 or Mozilla Public License version 2.
It's not a "free software company" in the sense that we only *use* free software - new employees are free to choose their operating system and favorite programs, and while most developers use GNU/Linux, some prefer OSX or Windows, and that's completely OK. What matters is that none of the software that we deliver to customers is under a non-free license.
I wrote a blog post about that, and I hope to be able to elaborate on our practical work with free software in future posts:
http://blogs.fsfe.org/agger/2017/01/24/working-with-free-software/