The iTunes App Store offers downloads of several applications for Apple iPhone and iPod touch for free, as listed below. At up to $6 off, each is at the lowest price we've seen. The deals:

• Image Photo for iPhone and iPod touch: Photo filter tool
• Jet Heroes XD for iPhone, iPod touch, and iPad: Top-down shooter
• Armed and Gorgeous HD for iPhone, iPod touch, and iPad: Hack n' Slash game
• Serenity for iPhone and iPod touch: Stress-management
• Lunar Racer for iPhone, iPod touch, and iPad: Racing game
• R-Tech Commander: Galaxy for iPhone and iPod touch: Top-down shooter
• New York 3D Rollercoaster Rush (pictured) : Roller coaster simulation game