Houghton Mifflin Harcourt has Carmen Sandiego Returns (iTunes Link) for the iPhone, iPod Touch, iPad in the iTunes App Store for FREE (regularly $1.99) for a limited time.

For her 30th anniversary, Carmen Sandiego Returns with her V.I.L.E. Henchmen for another round of adventure and chaos! Test your skills as an ACME Agent by traveling the world, tracking down clues and capturing the elusive Carmen Sandiego and her Henchmen. Houghton Mifflin Harcourt brings you this exciting game filled with History and Geography along with challenges to test your mind and skills as an Agent.

From the first time you enter ACME Headquarters you’re given three missions to track down Carmen Sandiego and her Henchmen. If you have the necessary skills and continue to crave a challenge, find out what other mischief the Villains are getting in to with the next set of Missions available for purchase.

Vito Technology Inc. has Next – Numbers (iTunes Link) for the iPhone, iPod Touch, iPad in the iTunes App Store for FREE (regularly $1.99) for a limited time.

Human brain is like a muscle that should be trained a lot to function properly. Surely, everyday life is a game in itself, but haven’t you ever wished you could find things a little faster or concentrate on one task for a little longer? This app is a great tool just for that. With just a few minutes a day practice you will be able to improve areas of brain activity without even noticing it. We have also built in personal stats so you can keep track of your progress.

ZeptoLab UK Limited has Cut the Rope 2 (iTunes Link) for the iPhone, iPod Touch, iPad in the iTunes App Store for FREE (regularly 99-cents) for a limited time.

Om Nom’s shenanigans continue in Cut the Rope 2! With new characters, fresh gameplay elements and tricky missions, candy collecting has never been so fun!

In his unexpected adventure, Om Nom breaks out of his box and travels through lush forests, busy cities, junkyards and underground tunnels, all in pursuit of one goal – CANDY! Along the way, he encounters the Nommies, the cutest candy collecting helpers a little green monster could wish for!