iOS: If you'd like to see the world, Tripnary is an awesome iPhone app that can help you fulfil your wanderlust on a budget. The app lets you save cities and attractions you want to visit as well as discover new ones with a simple swipe through travel photos.
Hit the airfare button to compare flight prices (provided by Skyscanner) for the cities on your list so you can choose the destination that fits your budget best.
You can also see all the restaurants, hotels, sights, and other places you've "hearted" for a particular trip in Tripnary's map view.
Deciding where to go first when there are 1000 places to see before you die just got a little easier.