Philip MichaelsEditor, Macworld

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Philip has covered the Mac market since 1999, with a focus on the iPhone, iPad and iOS in recent years. In all that time, he has never tested a fart app.

SlideShark for iPad

If you're a business traveler whose road show hinges heavily on PowerPoint presentations, this app -- which translates PowerPoint files into an iPad-friendly format -- is a must-have.

iBomber Defense Pacific for iPhone and iPad

This solid tower-defense game puts an emphasis on strategy, and players reap the rewards.

World Atlas HD and The World by National Geographic for iPad

Both World Atlas HD and The World by National Geographic are decent atlas offerings for the iPad. But there are some missed opportunities with both apps to fully take advantage of the iOS platform.