Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
Tune Sweeper - Show duplicates in your Music library. Automatically select which duplicates to keep and delete based on your preferences. Remove duplicates with one-click from your iTunes or Music app library.
KAYAK - KAYAK is a travel search engine that searches hundreds of other travel sites at once. Our helpful tools & features find you the information you need to make the right decisions on flights, hotels, rental cars and vacation packages.
iTunes Duplicate Song Manager - iTunes Duplicate Song Manager with Folder Watch removes iTunes duplicates in Windows and Mac OS X.
Momondo - Find cheap flights with Momondo.
SongGenie - SongGenie analyzes, identifies and repairs your mp3 tags and names.