Mole Kart [Free], the world’s most blatant Mario Kart clone, is now free for a “limited time," on the App Store according to the game’s developer. As we’ve covered in the past, Mole Kart lacks a lot of Mario Kart‘s feature set, but what it include, it charges for piece by piece as IAP unlocks. So, when we say free, we mean that pretty loosely; in this case the cover charge is the only price barrier that has been removed.
If anything, now you’ve got a chance to see just how blatant of a rip-off that Mole Kart is without dropping three bucks beforehand. You could also watch this trailer or read this thread, though, and save yourself some time: