A few years ago, the Samsung Galaxy S III was everywhere. It didn't have the build quality of an iPhone, but the screen was bigger, and Android apps were really coming into their own. The phone began its life running Ice Cream Sandwich, and most variants stopped at Jelly Bean with no hope of ever getting Lollipop.
Installing CyanogenMod got some model to Android 5.0, but most were left behind on KitKat and CyanogenMod 11. Now the international Galaxy S III (i9300) is skipping Lollipop entirely and getting Marshmallow with CyanogenMod 13.
So far the device has received a single nightly, so don't expect a completely stable experience. Still, for those of you still holding on to a Galaxy S III, the future is looking a little brighter.