Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
Mixed in Key - Mixed In Key is award-winning DJ software that gives you the #1 technique of the world's best...
JetRadar - Compare flights from hundreds of airlines & travel agencies
Tunebat - A browser based song key and bpm database. Supplies compatible songs for harmonic mixing.
Kiwi.com - Find and book the best low-cost flights all around the world
KeyFinder - Key estimation software for DJs