Code
talklively
TalkLively is a chat system where a users can see the messages instantaneously rather than waiting for the other party to press 'send' or enter. This make the chatting experience far better. Though in the beginning you might fear the embarrassment but soon you get used to it and start loving it.
History:
TalkLively is inspired by Unix-Talk program which used to give the same experience. I always loved it. It was very involving. So, after seeing that even Google Wave has the same functionality, I was convinced that it will be useful app.