The iTunes App Store offers downloads of several apps for Apple iPhone, iPod touch, or iPad which have dropped in price, as listed below. At up to $5 off, each is at the lowest price we've seen. The deals, all with applicable platforms noted:

• Guitar Hero for iPhone and iPod touch for 99 cents (pictured, $2 off): Rhythm game
• Dark Incursion for iPhone, iPod touch, and iPad for 99 cents ($2 off): Side-scrolling game
• Riptide GP for iPhone, iPod touch, and iPad for 99 cents ($1 off): Role-playing game
• Warm Gun for iPhone, iPod touch, and iPad for $1.99 ($3 off): First-person shooter
• Another World for iPhone, iPod touch, and iPad for $1.99 ($3 off): Action adventure game
• My Measures and Dimensions PRO for iPhone, iPod touch, and iPad for $1.99 ($4 off): Measuring data tool
• Football Manager Handheld for iPhone, iPod touch, and iPad for $4.99 ($5 off): Soccer managing game
• Reiner Knizia's Tigris & Euphrate for iPhone, iPod touch, and iPad for $4.99 ($1 off): Board games