Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Foursquare - Foursquare is all about helping you find new ways to explore your city.
HiOperator - HiOperator is a virtual assistant that answers phone calls, chats with customers, provides in-app help, takes orders, and provides support.
Tripadvisor - The Tripadvisor mobile app is available for the Android and iOS platforms. It can be used to create reviews of hotels, restaurants, and to chat with other travelers on Tripadvisor forums.
ClaimCompass - Get paid for delayed or cancelled flights
Yellow Pages - YP.com local search connects you with over 19 million local businesses.