Unshaky tries to address an issue on the butterfly keyboard (Macbook, Macbook Air 2018 & MacBook Pro 2016 and later): Double Key Press (See “User complaints” below)

Apple made it difficult to replace only the keyboard and it costs hundreds of dollars. Unshaky might save your keyboard by dismissing such “second key hits” (any key presses that occur no later than x milliseconds after the previous effective one)