ARToolKit 6 is a fast and modern open source tracking and recognition SDK which enables computers to see and understand more in the environment around them. It is being built from the ground up using modern computer vision techniques, up to the minute coding standards and new technologies developed in-house at DAQRI. ARToolKit 6 is being released under a Free and Open Source License that will allow the AR community to use the software in commercial products as well as for research, education and hobbyist development.