The iTunes App Store offers downloads of several apps for Apple iPhone, iPod touch, and iPad which have dropped in price, as listed below. At up to $4 off, most are at or near the lowest prices we've seen. The deals, all with applicable platforms noted:

• AccuTune for iPhone, iPod touch, and iPad for 99 cents ($2 off): Chromatic tuner
• Flight Unlimited Las Vegas for iPhone, iPod touch, and iPad for 99 cents (pictured, $4 off): Flight simulator
• WikiLinks for iPhone, iPod touch, and iPad for 99 cents ($3 off): Wikipedia client
• Comic Photo Pro for iPhone, iPod touch, and iPad for $1.99 ($1 off): Photo filter creation tool
• My First TRAINZ Set for iPhone, iPod touch, and iPad for $1.99 ($1 off): Train simulation tool
• The Last Express for iPhone, iPod touch, and iPad for $2.99 ($2 off): Adventure game
• WolframAlpha for iPhone, iPod touch, and iPad for $2.99 ($1 off): Interactive search engine