The first LuneOS release
LuneOS is the new name for the mobile system once known as WebOS; the first release is available for brave testers now. "The main focus of LuneOS is to provide an operating system which is driven by the community and continues what we love(d) about webOS. We’re not trying to reach feature comparison with Android or iOS but rather building a system to satisfy basic needs in the mobile environment." The Nexus 4 and HP TouchPad appear to be the best devices for those wanting to try LuneOS out on real hardware.

Clarification: LuneOS is not really a direct successor to webOS; it, instead, can be thought of as a sort of fork of the Open webOS project (managed by LG) focused on porting the system to other devices.