Acme FAQ
Q: Does Acme depend on using a three button mouse?
A: Acme is as dependent on a three button mouse as Emacs is on finger gymnastics and vim is on the Esc key. But don't let it discourage you, Acme's user interface makes much better use of the mouse than any other text editor. (Paraphrased from an answer given by Jessta on golang-nuts.)