Another Forth CPU by the Forth creator Chuck Moore and colleagues:
http://www.greenarraychips.com/. It's has 144 cores on a square centimeter chip.
Each core is equipped with its own little data and control Forth stacks, making it a fully fledged independent computer (that's why the more precise term is "multi-computer chips" rather than "multi-core").
The cores talk to each other via communication ports. Writing to a port suspends the core until
the peer reads the value. And vice-versa.
(similar to channels in Go language).
Some other interesting properties (quoting the docs):
A computer can read from multiple ports [corresponds to Go's select] and can execute instructions directly from those ports.
FINE GRAINED ENERGY CONTROL: ... The read or write instruction is automatically suspended in mid-operation if the address [one or more of communication ports and I/O pin] is inactive, consuming energy only due to transistor leakage currents, resuming when the address becomes active.
NO CLOCKS: Most computing devices have one or more clocks that synchronize all operations. When a conventional computer is powered up and waiting to respond quickly to stimuli, clock generation and distribution are consuming energy at a huge rate by our standards, yet accomplishing nothing. This is why “starting” and “stopping” the clock is a big deal and takes much time and energy for other architectures. Our architecture explicitly omits a clock, saving energy and time among other benefits.
http://www.greenarraychips.com/home/documents/greg/PB002-100...