GoPass
GoPass uses moves in a game of go to generate a password.
... of this is done locally. No information is sent outside of the program.
Because go players can remember game moves so well (the information is meaningful), it allows them to use unique passwords for different websites without having to memorize strange strings of symbols (which are meaningless).
How strong are the passwords? The complexity is 361 * 360 * 359 ... n times where "n" is the number of moves. So after 8 or so moves, they are pretty strong. And when put with the seed, it is very strong.