Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Skyscanner - Skyscanner.com compares over 1000 airlines to find you the cheapest airfares, fast.
HiOperator - HiOperator is a virtual assistant that answers phone calls, chats with customers, provides in-app help, takes orders, and provides support.
Kiwi.com - Find and book the best low-cost flights all around the world
GetHuman - Find customer service numbers fast
App in the Air - The perfect companion for everyone taking a flight.