The iTunes App Store offers downloads of several apps for Apple iPhone, iPod touch, or iPad for free, as listed below. At up to $3 off, each is the best deal we've seen. The deals:

• Viking Age for iPhone, iPod touch, and iPad: Action game
• Extinction 3D for iPhone, iPod touch, and iPad: Top-down zombie battle
• Rome Defence for iPhone, iPod touch, and iPad: Tower defense game
• Schiele for iPhone, iPod touch, and iPad: Virtual art gallery
• Infectonator for iPhone, iPod touch, and iPad (pictured): Puzzle game
• OSnap! Time-Lapse & Stop Motion for iPhone, iPod touch, and iPad: Stop motion camera
• Shark Dash for iPhone, iPod touch, and iPad: Running game