Pacemaker released for the BlackBerry PlayBook a few months back, but until now was only available for full price at $19.99 or $4.99 for the lite version. Good news for aspiring DJs as Pacemaker is now available as a free trial as well. The cool thing is that there are no limitations to the free version so you'll get to try out all of the amazing features for a full two weeks before having to purchase. Pacemaker features great effects like auto beatmatch, scratch, time stretch, pitch speed and many more. Check out all the version in BlackBerry App World from the link below.