Eero - WiFi router.
Hardware effects - Demonstration of various hardware effects.
LiteX - FPGA design/SoC builder that can be used to build cores, create SoCs and full FPGA designs.
Migen (Milkymist generator) - Python toolbox for building complex digital hardware.
The future of computing: a conversation with John Hennessy (Google I/O '18)
Awesome Firmware Security
FindChips (HN) - Get instant insight into any electronic component.