Pokecrew - Crowdsourced Pokemon Go map
Poke Radar - Discover the location of any Pokemon
PokemonGo-Map - PokemonGo Map is a web-based tool that helps you quickly locate all the nearby Pokemon on the map.
Pokémap - A Pokémon GO tracker for Android!
TypeDex - A comprehensive Pokémon type calculator and Pokédex
PokeHunter - PokeHunter is a live scanner to help you find the pokemon you want, not just pidgeys and rattatas.