Another new site, been up for only a few days: https://www.spacemining.io/?ref=114601
You get 100GHs hashing power free here as well to start with. This one is new. so I don't know how great its going to be. However seems okay to start with the free hashing power. The cost for purchasing hashing power is one of the cheapest among-st the other mining websites. You get 1.5THs for a cost of only 0.0015 btc. That seems really great. Also I have been told that this has been paying out. I have just now signed up and have purchased hashing power as well.
Ref link: https://www.spacemining.io/?ref=114601
PS: I am not a financial advisor. This is just my opinion. This seems good for me, hence, I signed up. Just though of sharing.