SLOTSCREAMER is an inexpensive device configured to access memory and IO, cross-platform and transparent to the OS - all by design with no 0-day needed.
The open hardware and software framework  was presented and released at DEFCON 22
HALIBUTDUGOUT is a thunderbolt enclosure containing a SLOTSCREAMER device for attacking against thunderbolt hosts.
ALLOYVIPER is a thunderbolt cable cosmetically modified to look like a Displayport to VGA adapter to get unsuspecting individuals to attach to a HALIBUTDUGOUT
The talk along with updated progress will also be at 44Con in London and Breakpoint in Melbourne
Project Overview:
Full details, documentation, and code:
Video Demo: