Here you will find an aggregated list of WebSocket demos from all over the Web.
Several examples of WebSocket together on the one page. The bar along the bottom of the screen lets you connect to Google Chat over WebSocket.
Mr. Doob's Multiuser Sketchpad
A shared sketchpad that everyone can draw on at the same time. Websockets are used to keep up with the position data shared between users.
Norwegian for "tadpole", swim around with other rumpetrolls. WebSockets communicate positional data between all users.
The WebSocket Difference
A video that visually demonstrates the performance improvements you get by using WebSocket.
Video Sync with WebSocket
Shows a single controller controlling the video that all connected users are watching.