There is at least one user on our site who constantly provides good/excellent answers. However, I can almost always find typos in his answers. Those typos do not impact the overall quality of the answers. Still, typos are typos.
I myself always want to have the spell checker available on our site. My workaround is to use my own word processor off-line to check the typos before I post an answer. This causes extra efforts.
My question is,
Do we have spell checker available on stack exchange sites? If yes, how do I use it? If not, why?