> http://www.arm.com/about/newsroom/arm-launches-cortex-a50-series-the-worlds-most-energy-efficient-64-bit-processors.php

Finally :-) Seems my assumption about Calxeda's Lago being their own core design was wrong. So in terms of 64-bit ARMv8 (AArch64) cores, there is announced so far:

- Cortex-A53 and Cortex-A57 from ARM Ltd.
- Denver from nVidia
- X-Gene from Applied Micro
- Thunder from Cavium