I always wish I could just plugin a Google spelling check API into things like Microsoft Word instead of using the inbuilt ones.

i.e. the amount of times I cant spell a word, and MS Word has no idea what I'm trying to say, so I "copy and paste" the wrong word into Google and it instantly knows what I meant and shows me the correct spelling.

I appreciate part of that is probably related to my previous searches on Google and it guesses based upon my history - but I'd be ok with using this for "good" like my spell checking.