I think that the good approach was taken by Twisted Matrix:<p><a href="https://twistedmatrix.com/trac/wiki/CommunityCode" rel="nofollow">https://twistedmatrix.com/trac/wiki/CommunityCode</a><p>"official" Twisted projects retain the "Twisted" name. Community projects related to twisted use the "tx" prefix. This allows both a clear identification of related code, and present no issue with trademarks.
Alright, so there isn't a problem at all. Docker isn't forcing anybody to not use the name 'docker' nor did they sue anybody.<p>Nothing to see here, move along..