You wanting a hotkey program to simulate key presses? Im not exactly sure what you are asking for. Have you tried much with Applescripting or bash files with Terminal? Alot can be done with these. Spark is a free hotkey program. I am using Keyboard Maestro (payed program) for Mac with spams and the current duping method, which you can also execute Applescripts and i would say you can execute bash also. Sorry if im way off of what you are asking for.