Amateur radio

• Homebrew D-STAR Radio
• HackRF One

Audio electronics

• Monome 40h – reconfigurable grid of 64 backlit buttons, used via USB; a limited batch of 500 was produced; all design process, specifications, firmware, and PCB schematics are available online
• Neuros Digital Audio Computer – portable digital audio player
• Arduinome
• MIDIbox – modular DIY hardware–software platform for MIDI devices including controllers, synthesizers, sequencers

Telephony

• Openmoko – phone framework (first use case: First International Computer (FIC) Neo FreeRunner, released as of mid-2008
• OpenBTS and OsmoBTS – software-based GSM base stations
• Project Ara – modular design, hot swapping pluggable mobile phone; due to enter trial production in 2015, but was suspended in 2016^[1]
• PiPhone and ZeroPhone
• Telecom Infra Project – collaborative Open Compute Project focusing on optical broadband networks and open cellular networks to create global access
• PinePhone – developed by computer manufacturer Pine64, intended for allowing the user to have full hardware and software control over the device, released as of end-2019

Video electronics

• Milkymist One – video synthesizer for interactive and dance-directed VJing
• Neuros OSD – digital video recorder

Networking

• NetFPGA – hardware platform, software, community, and education material to enable research and education effort in a line-rate network environment

Cameras

• AXIOM – digital cinema camera built by apertus° community
• Elphel, Inc. – cameras based on free hardware–software designs

Computer systems

• Arduino – open-source microcontroller board
• The Bus Pirate – universal bus interface and programmer
• Chumby – information ambient device
• Color Maximite – open-source single-board computer running the BASIC language as its operating system and compatible with Arduino Uno micro-controller peripherals
• CUBIT – multitouch surface-interaction system
• Humane Reader and Humane PC
• LART
• Micro Bit – ARM-based embedded system
• MIPS – a reduced instruction set computer (RISC) instruction set architecture
• N8VEM
• Netduino – microcontroller board, .NET Micro Framework based
• NodeMCU – Wi-Fi microcontroller board
• Novena – an ARM based computer built by Andrew Huang and associates
• NVIDIA Deep Learning Accelerator (NVDLA) – AI accelerator for training neural networks, created by Nvidia
• OpenPOWER – Power ISA, an open-source hardware instruction set architecture initiated by IBM
• OpenSPARC – Sun's, later Oracle's high-performance processor
• Parallax Propeller – a multi-core microcontroller with eight 32-bit RISC cores
• Parallella – single-board computer with a manycore coprocessor and field-programmable gate array (FPGA)
• Pinebook – Notebook from Pine64
• RISC-V – an open-source hardware instruction set architecture
• SparkFun Electronics – microcontroller development boards, breakout boards
• Turris Omnia – open-source SOHO network router

Peripherals

• Nitrokey – USB key for data and email encryption and strong authentication
• System76 Launch – US-manufactured Mechanical keyboard line designed and built by System76 with open-source firmware
• 'Faire Computermaus' / 'fairtrade computer mice' by Fair IT yourself e.V.^[2][3]

Robotics

• ArduCopter – Arduino-based drone
• e-puck mobile robot – mobile robot designed for education
• ICub – 1 metre high humanoid robot
• OpenRAVE
• RobotCub – predecessor of ICub
• Spykee
• multiplo
• OpenROV – telerobotic submarine
• Salvius
• Thymio – robot for education
• TurtleBot

Microcontrollers

• Freeduino – an open-source physical computing platform based on a simple I/O board and a development environment that implements the open source Processing / Wiring language. Also clones of this platform including Freeduino.
• Tinkerforge – a platform comprising stackable microcontrollers for interfacing with sensors and other I/O devices

Components

• Ethernut – embedded Ethernet adapters
• IOIO – a board that allows Android applications to interface with external electronics
• PLAICE – a device that combines a flash memory programmer, in-circuit emulation, and a multichannel logic analyzer. It runs uClinux.
• Twibrigh RONJA – a 10 Mbit/s full duplex FSO wireless optical network adapter from 2001^[4]
• System76 Thelio Io – System76 Thelio desktops use an open-source daughterboard to control thermals and other functions. This is a step toward building a fully open-source computer and give users full control over their hardware.^[5]

Renewable energy

• DIY wind turbines

Lighting and LED

• LED Throwies – nondestructive graffiti and light displays

Architecture and design

• WikiHouse – project to design and build houses
• OpenStructures – design from furniture to house

Domotics

Automotive

3D printers and scanners

• RepRap project – 3D printer-fabber; recyclebots, like the Lyman filament extruder, provide the filament for RepRaps
• LulzBot – 3D printer design by Aleph Objects; is Respects Your Freedom certified by the Free Software Foundation
• Voron Design – nonprofit organization developing specifications for 3D printers, including the Voron 0.2, Voron 2.4, and Voron Trident

CNC milling machines

• FarmBot
• Maslow CNC - an open source CNC router project notable for low cost and unique vertical design

Other hardware

• Open Source Ecology's Global Village Construction Set (GVCS) – 50 industrial machines needed to build a small civilization with modern comforts
• Precious Plastic's – plastic recycling tools – Shredder, Extruder, Injector, Compressor, and supplemental resources
• Defense Distributed/Liberator (gun)

• Charon (gun)
• FGC-9 (gun)

Medical devices

• Open Prosthetics Project – design of open-source prosthetics
• Open-source ventilator

Scientific hardware

• Open-Source Lab – documents dozens of scientific tools, but is closed-source itself
• OpenBCI – EEG amplifier^[7]

Computers

Instruction sets

• J-Core, an implementation of the SuperH with some extensions^[16][17]
• MIPS ^{[citation needed]}
• Power, which originated from IBM's POWER ISA
• RISC-V, a RISC ISA that originated in 2010 at the University of California, Berkeley
• SPARC

Organisations

• Bug Labs, a US technology company that began by developing and selling open-source hardware peripherals for rapid prototyping of electronics
• LowRISC, a not-for-profit organization that aims to develop open hardware
• M-Labs, developers of the Milkymist system on a chip
• Open Compute Project, an organization for sharing designs of data center products among companies
• Open Graphics Project, a project that aims to design a standard open architecture for graphics cards
• OpenCores, a loose community of designers that supports open-source cores (logic designs) for CPUs, peripherals and other devices. OpenCores maintains an open-source on-chip interconnection bus specification called Wishbone
• OpenRISC is a group of developers working to produce a very-high-performance open-source RISC CPU.