Simplemining OS

 Very simple to start off, been using it myself. But after a while, I was just missing greater opportunities to tweak and overclock and change settings for my cards. So I went back to Windows, where there is just nothing missing at all. But this may be great for beginners, as it is pretty straight forward to use. As you don't have to set up any miners or things, and also it is auto updated. But also a rig costs about $2 per month.

It worked out great for a while, but there are better options.