Games, Image editing software.. Having the tap-to-click feature always enabled on your trackpad can be annoying, and switching it back and forth can also become annoying.
Meet Pa'ina, one click, one hotkey away, to toggle the tap-to-click feature
Attention: Pa'ina does not change the system preference attached to this setting, but simply overrides the behavior of your trackpad when Pa'ina is running. That means that while Pa'ina is running you should not change the setting from within the System Preferences. When you quit Pa'ina, the original setting as it was defined will be restored.