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.
Hackster - World's largest network for hardware & software developers.
nMigen - Refreshed Python toolbox for building complex digital hardware.
Cerebras CS-1 - Built from the ground up to accelerate deep learning in the data center.
hackrf - Low cost software radio platform.
Meshtastic - Open source hiking, pilot, skiing, Signal-App-extending GPS mesh communicator.
Tindie - Buy and Sell DIY hardware products.
ZetZ - For code close to hardware, where C is and will remain the defacto standard system interface. You can also use it to build cross platform libraries, with a clean portable C-standard api.
Espressif Systems - Semiconductor company.
llhd-sim - LLHD reference simulator.
moore - Hardware compiler based on LLHD.
HAL - Hardware Analyzer.
Breadbee - Breadboard-able Cortex A7 dev board.
GoKey - Bare metal Go smart card.
rio - Open source library allowing you to create an internet connected LED wall.
ShinySDR - Software-defined radio receiver application built on GNU Radio with a web-based UI and plugins.
SAFARI Research Group - Part of the Institute for High Performance Computing Systems in the Department of Computer Science at ETH Zurich.
Instructables - Community for people who like to make things.
Chips (Common Hardware for Interfaces, Processors and Systems) Alliance - Develops high-quality, open source hardware designs relevant to silicon devices and FPGAs.
Teensy - Complete USB-based microcontroller development system, in a very small footprint, capable of implementing many types of projects.
WLED - Control WS2812B and many more types of digital RGB LEDs with an ESP8266 or ESP32 over WiFi.