WSVN — You'll want to go to the head of the class with our first app. "I-tunes-u" gives you the opportunity to take classes anytime, anywhere on your smart phone.All kinds of courses from top universities are offered free. Choose from more than half a million lectures, videos and books on thousands of subjects. And all assignments and updates from your teachers are posted in one place.I-tunes u makes it easy to app-ly yourself.Musicians will love this one. Learn to tune a guitar the easy way, "Guitar Tuner Lite" helps you play your way to perfect pitch. Just tap to hear the note you want and pluck the string you want to tune the app uses a visual interface to let you see when you've hit the right note. Guitar tuner lite uses standard tuning so you'll never be off-key again.And finally a Jurassic journey on your smart phone. "Dinosaurs: The American Museum of Natural History Collections" looks like a t-rex when it comes up but the home page is actually a mosaic of more than 1000 images from the museum's archives. Explore dino history and fossil collecting-or zoom in and double tap to get info about where fossils were found, make comments, send your favorite pictures to friends and start your own virtual dino dig. CRAIG STEVENS: "And if you happen to be visiting the American Museum of Natural History in Washington, D.C. you can use this free app as a museum guide. Guitar Tuner lite and i-tunes u are also free."FOR MORE INFORMATION:i Tunes Uhttp://itunes.apple.com/us/app/itunes-u/id490217893?mt=8 Guitar Tuner-GuiTune  Litehttp://itunes.apple.com/us/app/guitar-tuner-guitune-lite/id404374511?mt=8 Dinosaurs: The American Museum of Natural History Collectionhttp://itunes.apple.com/us/app/dinosaurs-american-museum/id351849237?mt=8

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