StateOfTheArt.ai
When I think of the things I would add to this, I realize how amazingly useful it would be to have more data on the tasks themselves. For starters, whether or not there is code and what license under which it is released, and for NLP what languages were used/are available for use. Also, sign language recognition fits somewhere between computer vision and NLP. If picked up by the community, this could become a huge knowledge base.