PokeHunter - PokeHunter is a live scanner to help you find the pokemon you want, not just pidgeys and rattatas.
Poke Radar - Discover the location of any Pokemon
AnyGo - If you've ever wondered the cost differences of flying vs driving to any destination in the US, like from New York City to Atlanta, AnyGo allows you to compare prices side by side, which makes planning your trip easier.
A & M Map - A & M Map is a map application that is developed for Pokemon Go lovers.