The iTunes App Store offers downloads of several applications for Apple iPhone, iPod touch, or iPad for free, as listed below. At $1 off, each is at the lowest price we've seen. The deals:

• AirAV for iPhone, iPod touch, and iPad (pictured): UPnP/DLNA media player app
• RyeBooks: The little carp that jumped over... for iPhone, iPod touch, and iPad: Storybook
• FatBooth for iPhone and iPod touch: Photo effect app
• Mermaid Waters for iPhone and iPod touch: Preschool math game and story app
• Inspector Gadget's MAD Dash HD for iPad: Adventure game
• Compass, Flashlight, Speedometer, Altimeter... for iPhone and iPod touch: Navigation app