Can someone help me find 3rd party league tournament sites?

Hi there! This post is to help me, and others find 3rd party LoL tournament sites. You see, I have a bunch of friends that play CS:GO, and they play 3rd party tourneys all the time! The only one that I can find for league is FACEIT, and even there their League tourneys are in private beta.

So, if you know of a 3rd party site that has tournaments for LoL, just put the link in a comment.

Thanks!

P.S If you don't know what a 3rd party site is its a site that serves as a hub for something. In LoL's case its like the community event page, except that a 3rd party site isn't run or monitored by Riot.