Amazon a running a fantastic promotion in their Amazon App store (link) right now (for 2 days). They are offering 31 decent popular apps and games for free. Outside of this promo, these would cost you $100 to buy. So this is definitely a download it now type of promo.

Some other promos typically include 1 good app and 20 horribly designed crap but this is a decent list worth looking at.

Apps like : Pinball Deluxe, Splashtop Remote HD, Sonic the Hedgehog 2, Plex, Informant 3, and many more