For some time I've looking for a simple editor, for writing mathematics, like the one I'm using right now on StackExchange.
My needs are as follows:
live preview/rendering of what you are typing (you shouldn't press a 'compile' button for seeing the result of your markup)
no control syntax needed like 'include' and other stuff that goes into categories meta/preamble/formatting.
I need something simple, where I can type in a problem without going through a lot of steps. It should be as fast as typing a question here on StackExchange.
Got any ideas?