Anyone up for a private viewing of the Sistine Chapel or a helicopter ride above New York City?
Available for: iPhone and iPad, with an Android version in development
What it does: Highlights thousands of things to do in the world's top 100 cities.
What's hot: Spin the globe, find a city and uncover a list of the best attractions, day trips and memorable experiences in the world's most visited destinations. Keep clicking and you'll find photos, traveler reviews and links to the Viator website, where you can purchase tours and tickets. You can also create a wishlist and share your favorites with friends via email, Facebook and Twitter.
What's not: Those who already use the Viator website might be annoyed that the tour and pricing information is not more upfront in the app. It seems more focused on inspiring travel than selling it.