Virtual Audio Cable - Ever wanted to record your speaker output? (loopback) This is for you.

Machinarium - Machinarium is independent puzzle / adventure game by Amanita Design

Soundflower - Soundflower is a Mac OS X system extension that allows applications to pass audio to other...

Unmechanical - Fun and atmospheric side-scrolling puzzle adventure.

Loopback by RogueAmoeba - Get all the power of a high-end studio mixing board, right inside your Mac!

Limbo - “Dark, disturbing, yet eerily beautiful, Limbo is a world that deserves to be explored.” Joystiq. “Limbo is as close to perfect at what it does as a game can get.” Destructoid. Buy LIMBO: Special Edition.