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:

• ProPlayer for iPhone, iPod touch, and iPad for 99 cents ($4 off): Video player
• Panamp for iPhone and iPod touch for 99 cents ($2 off): Music-listening app
• Kitten Sanctuary for iPhone, iPod touch, and iPad for 99 cents (pictured, $1 off): Kitten-rescuing game
• Algebra Touch for iPhone, iPod touch, and iPad for 99 cents ($2 off): Math solving tool
• Projects for iPhone and iPod touch for $4.99 ($1 off): Project management tool