The iTunes App Store offers downloads of several applications for Apple iPhone and iPod touch for free, as listed below. At up to $10 off, each is at the lowest price we've seen. The deals:

• Poly HD: Physics-based puzzle game
• TowerMadness (pictured): Tower defense game
• Tap-Translate: Translation utility
• Paper Glider Crazy Copter 3D: 3D flight game
• Nuts!: Tree-scaling game
• Mexiball: Accelerometer-based game
• Blender Express: Matching game