Lingr

Offer personalized chat room services. Through the search box on the homepage, enter a keyword that interests you, and you can enter a chat room related to that topic created by others. After you register, you can also create your own chat room, wait for others to join, and then start chatting. The content of the chat will also be archived, so it can be used as a message board. Everyone can take a look at the chat room I built using this: http://www.lingr.com/room/52OuxgGvFxr