Hi. This app supports ShortDeck -
www.hack.poker
First time it loads for about 30 seconds, but all the subsequent times it will load almost instantaneous.
It has somewhat unusual interface - command line, but actually it is much faster in many situations to input range from keyboard than select it with a mouse.
You can calculate equities between ranges. You can specify any kind of board you can imagine, for example calculate equity of QQ vs 9T on any A high flop.
You can calculate hand strength distribution. To switch to ShortDeck mode use command - 'game sd'