Poke Radar - Discover the location of any Pokemon
Pokecrew - Crowdsourced Pokemon Go map
PokeMapper - Share and find #PokemonGO creatures
PokemonGo-Map - PokemonGo Map is a web-based tool that helps you quickly locate all the nearby Pokemon on the map.
PokeHunter - PokeHunter is a live scanner to help you find the pokemon you want, not just pidgeys and rattatas.
Pokemon Go Tools - Pokemon Go tools & reference charts