This hub describes my experience with Triond and shows my earnings through 2015.
This article explains how to get a guaranteed free epic general in Dragons of Atlantis Heirs of the Dragon. The article explains how to do it on an android device.
These are all of the ways to obtain free gems in Castle Clash each day. Doing these steps will net you at least 100 gems a day if not more. New players can get 100 free gems a day.