The former CyanogenMod team is now back with LineageOS, another Android-based ROM that is already available in the shape of a few unofficial builds that run on over 66,000 devices. The official versions coming soon promise support for over 80 handsets and weekly updates.
http://www.notebookcheck.net/LineageOS-to-offer-weekly-updates-and-support-for-over-80-devices.192328.0.html