Typically https://news.ycombinator.com and scroll down.
84 karma · joined October 21, 2013
Go to Snapzu if you want more than a clone that has some rules (no hate) and a solid community, but most importantly tries to innovate and not just copy reddit.
Go to Hubski if you want a civil place to discuss things without all the flashy pictures and what not.
https://medium.com/p/1e1fcdea99c4
That's if anyone's interested.