[tyingq]

The TI AM335x is a good example of that. An ARM core with 2 "PRU" microcontrollers, and they share access to the memory. The BeagleBone Black uses the AM335x, and there's various projects that make use of the PRUs. A list of some of them: https://beagleboard.org/static/prucookbook/

[aswanson]

Also the TI AM6442. Its an awesome chip but the sdk and tooling for the evaluation board is a little rough around the edges.