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 $4 off, each is at or near the lowest price we've seen. The deals, all with applicable platforms noted:

• Book+ for iPhone, iPod touch, and iPad for 99 cents ($4 off): eBook reader
• 7-in-1 Translate for iPhone, iPod touch, and iPad for 99 cents ($3 off): Foreign language tool
• Ballerburg for iPhone and iPod touch for 99 cents (pictured, $1 off): Remake of classic game
• BloodWork for iPhone, iPod touch, and iPad for 99 cents ($4 off): Blood condition management tool
• F16 Battle! for iPhone, iPod touch, and iPad for 99 cents ($1 off): Project management tool
• reshakeMoo for iPhone and iPod touch for 99 cents ($2 off): Accelerometer-based game
• Retrogami for iPhone and iPod touch for 99 cents ($1 off): Photo modification software