Theriodex

Theriodex is an open-source Pokédex written in Ruby. It displays a random Pokémon with a bunch of information on the homepage but also has information about Pokémon moves, their abilties, evolutions and more! It even has a small Pokémon guessing game with difficulty settings. It is designed to be reasonably fast, give you the most important information at a glance and work well on both mobile and desktop.