This is a relatively new service brought to you by passion.digital.
It is a free spell checking service for your web pages. I am aware that most browsers have an inbuilt spell checker now and failing that, there are extensions that will do this kind of thing very well, but I just seem to like this one.
I find it a useful service and have installed the chrome plugin. I think it is better than the standard spell checker in chrome and recommend it.
Ironically, whilst spell checking this post it did flag Typosaurus as a mis-spelled word. Which I guess is correct, but still amusing.