Rabbid or make some sweet jumps in an itty-bitty monster truck? Ubisoft has got you covered. For the next 48 hours (give or take, at the time of this writing), you can snag Rabbids Go HD (iPad) or MotoHeroz for the iPhone for free. Also, as noted by VG247, Rabbids Go Phone Again (iPhone) and MotoHeroz HD (iPad) are currently free as well.
If that's not enough, you can also smite the unworthy on the cheap, as Babel Rising 3D (iPhone/iPad) is on sale for $0.99.