The fifth anniversary of the iOS App Store is just days away, but Apple is apparently preparing a gift for its users: a number of top apps that normally sell for $1 up to $20 have been reduced to free, including the $20 Traktor DJ for iPad, the $6 Infinity Blade and $7 Infinity Blade II, the $5 Barefoot World Atlas, the $4 multiplayer Badland (which just won an Apple Design Award last month) and the $5 Day One journal/diary app, along with a few others. There is no indication how long the sale will last, and no unified listing for the sale apps as of yet.
