This just got onto Slashdot, COWS Ajax. Spookily enough this is exactly what I was blogging about last week or so. Sometimes things hit all at once. A quick peek at COWS and it has:
- A server side library written in PHP. I don't know much PHP so I can't comment on that.
- A client side library written in JS that connects to the back end.
- An example client side spell checker
To quote the site: