GIMP

Or like Krita, no acronym whatsoever - just a cool name

Really? I see no reason for why the people who care too much what other meanings a name could possibly have shouldn't reject also that name on some ridiculous ground, like for example that it sounds childish "this is serious work, I won't do it with crayons like a child" or that the Ku Klux Klan used to be famous for using the letter K so there surely must be some connection there or any other insane imagined connection.