"Memory Alpha is a collaborative project to create the most definitive, accurate, and accessible encyclopedia and reference for everything related to Star Trek. The English-language Memory Alpha started in November 2003, and currently consists of 31,658 articles."
At the Superhero Database users can find profiles on many different superheroes and superhero teams which detail their personal histories and powers. Available at this site are also galleries, polls, games and more.
Wookiepedia is an online encyclopedia anyone can contribute to and is dedicated to compiling all knowledge from the various Star War franchises including the Original Trilogy, the Prequel Trilogy, the Expanded Universe and the Clone Wars cartoon.