Physical button to launch a PC application?
So for an upcoming project I need to make a physical button that when pressed launches an application on my PC. I'm going to need to make quite a few of these, each to launch a different app. Ideally it would not be a keystroke from a keyboard, I saw tutorials on dismembering a keyboard and registering a button press to open an app, but I don't want any interferences so I'm looking to avoid that if I can. I'm going for the most cost effective design, not looking to spend much if it can be helped. Any resources or tips would be much appreciated! Thanks guys!