Pokecrew - Crowdsourced Pokemon Go map
PokeHuntr - PokeHuntr is a website that helps find and identify Pokemon while playing Pokemon Go.
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
TypeDex - A comprehensive Pokémon type calculator and Pokédex