TriTone Digital has announced that MuteTone, a freeware utility plug-in for Mac OS X designed to workaround the inability to shut off input monitoring in Pro Tools, is now available as AAX 64-bit for Pro Tools 11.
MuteTone is freeware, though TriTone Digital had to pay some fee to upgrade it to AAX and offer it to all. Thus they are open to donations to cover that effort.