Android, iOS and ?
“We already know that there are two dominant mobile operating systems out there. But the current situation doesn’t really allow anyone to experiment, not without going through the interests and lenses of the two dominant players — Apple and Google. That’s why we need a third mobile OS to break this duopoly and move us towards a more open environment for anyone to innovate, without permission. Especially as mobile phones have begun to democratize and broaden the reach of technology around the world . . . why shouldn’t we then also democratize the mobile operating system?”
We Need to Break the Mobile Duopoly – We Need a 3rd Mobile OS – Peter Levine at Andreessen Horowitz