MagicPrefs
Used by 2 peoplemagicprefs.com ↗

“MagicPrefs is also in that vein, giving me more customization options over the gestures that can be done with the Magic Mouse.”
Mihai Parparita Interview, Software engineer · via Uses This 
“MagicPrefs for customizing the gestures and adding a middle click button to the Apple Magic Mouse.”
Adam Glazier Interview, Interaction + sound designer (IDEO) · via Uses This