Keytrader allows you to place buy or sell spreads for any coin on Bittrex, and cancel orders, and gives you a cancel all button. (!)
Keytrader requires that you have 100 KEY in your account.
Here is a tutorial video created by KeyTrader's programmer. It's a bit rough so we'll have the programmer give us the text in plain or make a video with voice narration. The program is pretty self-explanatory without the tutorial.