Pokecrew - Crowdsourced Pokemon Go map
PokéVision - Find all Pokemon near you in real time for Pokemon Go.
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.
Pokemon Evolution Calculator - A simple tool to calculate a Pokemon's CP after it evolves
PokeHunter - PokeHunter is a live scanner to help you find the pokemon you want, not just pidgeys and rattatas.