Since the collapse of Monero, the original Cryptonote coin Bytecoin has emerged as the only cryptonote challenger in the private and anonymous cryptocurrency field.

http://bytecoin.org/

Darkcoin currently holds the top position - it's well developed, has a strong community and a good daily trading volume.

Bytecoin is the challenger - again well developed, strong community (though not on BCT) and is not a clone of any previous coin.

They both have fast blocks, however Bytecoin has a much larger total supply.

It will be interesting to see how the competition between these two develops.

Sorry, but due to past behaviour -  rpietila or Monero devs are not permitted to post on this thread