I saw some online, but I don't trust the brands - there are some with no brand at all. It would be really handy to have a few of those on the house:
Or even convert every power outlet to an hybrid like this:
I would outfit my entire home with those if Anker produced them!
I know what's probably keeping them, though, at least for the hybrid option: there are so many plug types! I imagine it would be a production and logistical nightmare if they shot for having every plug available, or they would make quite some people unhappy if they didn't offered the plugs available on particular countries. Still, one has to dream, right?