AppyFridays is back at it again with a big giveaway and two Mac apps that have gone on sale as well. For a limited time only, you can purchase Sign PDF and IDsizer which are on sale, in addition three lucky participants will win one of the following prizes: Bluetooth Speakers ($130), Backpack for MacBook Pro ($130), and 2T portable hard drive ($150). To enter in the giveaway all you need to do is click here and like their Facebook page. Like always, we’ll keep you updated as AppyFridays has more sales an giveaways.