A few AJAX-based language tools
I used the following sites pretty often. They all happen to be language tools based on AJAX.

Spell Checker: It works very similarly to the spell checking from GMail, but you can use it any time and do not have to login. Its source code is available under BSD.

ObjectGraph Dictionary: Yes. It does not know the programming language Java

SevenForks Chinese Input: This is a killer. I do not have to install any software to input Chinese characters. That is a perfect tool especially when I use public computer to quickly input some Chinese.


