As part of the fifth anniversary of its iTunes App store, Apple has made some of its most popular iPhone and iPad apps availible to grab for free, including Native Instruments‘ freshly launched Traktor DJ. As we detailed in our recent review of the software, Traktor DJ is a rather compreshensive app which allows for one’s touch to control filters, EQs, FX, cue points, and basically every function a DJ could possibly need with a “minimalist, laser-focused approach on usability.” For today (July 8) only, Traktor DJ for the iPad can be downloaded for free here and for the iPhone here.