Ian

For chess players of any skill level, choose from 1,200 puzzles that help you learn the strategy of the game.

An under-appreciated tower defense game, an app to automatically create panoramic pictures, change your voice to sound like a Cylon and more in this week's hidden gems.

FlightTrack Pro: Fast, accurate and easy to navigate flight information in your pocket. Just e-mail your flight confirmation and you're good to go.