ProTransport (V. 1.0.3, Far Out Labs; $7.99) handles a variety of transport functions for Ableton Live, Digidesign Pro Tools, and Apple Logic and Soundtrack Pro. To make it work, you must first download and install the free ProRemote Control application for your Mac (Windows is not supported). In Pro Tools, you can you control transport features including scrub and shuttle, and you can also zoom the timeline and jump to and add markers. In the rest of the supported DAWs, the transport functions work fine, but, depending on the DAW, some of the other features don't work. Still, for $7.99, you get remote transport control, which is a heck of a deal. If you want to get even more serious, Far Out Labs also makes ProRemote (V. 1.0.3, $99.99) and ProRemote Light Edition (V. 1.0.3, $35.99), which combine transport functions with channel-strip control of 32 and eight channels, respectively, for the same supported DAWs.