Nikolas Konstantakopoulos introduces Geff 1.0, his new virtual guitar rack for OS X. Geff is a standalone audio effects application to use with your guitar, like you would a collections of stompboxes. It includes a variety of effects to create your unique sound. Add as many effects and re-arrange them as you like. Geff offers very simple handling for adding and rearranging effects, using MIDI learning to map almost any parameter of its effects to your MIDI controller. Geff 1.0 is $19.99 and can be downloaded from Mac App Store.