Here is a list of my all-time favorite online LoL resources. I share because I love.

Guides
Mobafire (obviously)
LoL Pro Guides written by pros only.
Skillshot (tentative) This site is in its infancy, but I have high hopes for it when it really gets off the ground.
League of Stats This site is just too awesome. It's a database of Champ and game statistics. Lookup the best counters, synergies, team comps, and builds.... Read More