The iTunes App Store offers downloads of several apps for Apple iPhone, iPod touch, or iPad for free, as listed below. At up to $2 off, each is the best deal we've seen. The apps:

• Galaxy Battles HD for iPhone, iPod touch, and iPad: Chinese checkers game
• Tesla Wars for iPhone and iPod touch (pictured): Tower defense game
• Tesla Wars HD for iPad: Tower defense game
• The Idiot Test 3 for iPhone and iPod touch: Quiz game
• Pig Shot for iPhone, iPod touch, and iPad: Action puzzle game
• Glow Puzzle for iPhone and iPod touch: Puzzle game
• War of Reproduction for iPhone and iPod touch: Strategy game
• Map My Ride+ for iPhone and iPod touch: Bicycle ride tracking app