Did you ever wonder why the periodic table is shaped the way it is, what gives each element its own unique set of properties, or even how elements combine to make everyday objects such as a cup of coffee? With “NOVA Elements,” explore an interactive periodic table, play a game hosted by David Pogue, or watch the two-hour NOVA program, “Hunting the Elements.”

You can track all available flights worldwide in real-time, and display them in one intuitive interface.

You can track all available flights worldwide in real-time, and display them in one intuitive interface.

Save web pages for later offline reading, optimized for readability on your iPhone or iPod touch’s screen. Featured by Apple and critically acclaimed by top blogs, newspapers, and magazines!

Signatures lets you save different contact details, digital signatures and notes so that you can easily mix and match content into new signatures.

The interface for Voice Brief is slick and it’s a great, simple way to get all your information read to you without needing to do anything besides listen.

Scorekeeper XL is a great app for keeping score when playing board games or party games with your friends.