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

• Burn the Rope Worlds for iPhone and iPod touch: Physics-based game
• Road Runner Office for iPhone, iPod touch, and iPad: Response-time game
• Spud Gun Attack for iPhone and iPod touch: Physics-based game
• Catball Eats It All for iPhone, iPod touch, and iPad: High-speed platform game
• Bike Race for iPhone, iPod touch, and iPad: Physics-based game
• SpecSynth for iPhone, iPod touch, and iPad: Music visualization tool