I am part of this site on facebook and they are always posting free applications. Here are the applications that are free for today.
http://itunes.apple.com/us/app/rover/id483262612?mt=8
http://itunes.apple.com/us/app/nasa-app-hd/id387310098?mt=8
Book creation platform. Great for homeschooling!http://itunes.apple.com/us/app/scribble-press/id487300076?mt=8
eDrops Nature (regularly .99¢ … some of our kids – and ourselves need a few minutes to relax …): http://itunes.apple.com/us/app/edrops-nature/id515845551?mt=8&ign-mpt=uo%3D4
AP Spanish Verbs (regularly $5.99 free for limited time … for older kids taking Spanish etc): http://itunes.apple.com/us/app/id392545987?mt=8
Starlight – Mobile Planetarium (regularly .99¢): http://itunes.apple.com/us/app/id489705597?mt=8
Let’s Name Things Fun Deck “Super Duper”: (regularly $1.99): http://itunes.apple.com/us/app/id454450994?mt=8
Audiobooks: Children’s Favorite Fairy Tales 3 (regularly .99¢): http://itunes.apple.com/us/app/id489385932?mt=8
Bunny Popper (regularly .99¢): http://itunes.apple.com/us/app/id490447459?mt=8
Tiny Painter HD (regularly $1.99): http://itunes.apple.com/us/app/id454204463?mt=8
Animated kids stories for word study 1 (regularly .99¢): http://itunes.apple.com/app/animated-kids-stories-for/id518898338?mt=8
tamarasadventures 