I've been collecting info about this kind of companies for quite a while, and warmly welcomed the creation of the Open Company Initiative (<a href="http://opencompany.org" rel="nofollow">http://opencompany.org</a>) in 2013 -- co-founded, among others, by Chad Whitacre from Gittip/Gratipay, who holds a pretty strong stance regarding organizational transparency.<p>Unfortunately, the model they've chosen for building up the directory is based on a specific pledge taken by the companies themselves, which makes community participation in expanding the list pretty much impossible (<a href="https://github.com/opencompany/www.opencompany.org/issues/103" rel="nofollow">https://github.com/opencompany/www.opencompany.org/issues/10...</a>)<p>So I decided to follow the example of the many awesome-x lists that have been sprouting up lately, and start a community-curated one for open companies, too. The list is by no means complete, so feel free to contribute your knowledge of open companies or other related resources that you think should be there.