This is a list of open-source hardware projects, including computer systems and components, cameras, radio, telephony, science education, machines and tools, robotics, renewable energy, home automation, medical and biotech, automotive, prototyping, test equipment, and musical instruments.

• Homebrew D-STAR Radio
• HackRF One

• 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

• 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

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

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

• OpenPicus – platform for smart sensors and Internet of things
• Sun SPOT – hardware–software platform for sensor networks and battery powered, wireless, embedded development
• USRP – universal software radio peripheral is a mainboard with snap in modules providing software defined radio at different frequencies, has USB 2.0 link to a host computer
• PowWow Power Optimized Hardware and Software FrameWork for Wireless Motes – hardware–software platform for wireless sensor networks
• Twibright RONJA – free-space optic system, DIY in a garage and maker culture, 10 Mbit/s full duplex/1.4 km
• SatNOGS – software-hardware project of a global low Earth orbit satellite ground station, including for data and Internet

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

• Arduino – open-source microcontroller board
• Chumby – information ambient device
• CUBIT – multitouch surface-interaction system
• Netduino – microcontroller board, .NET Micro Framework based
• NodeMCU – Wi-Fi microcontroller board
• Novena – an ARM based computer built by Andrew Huang and associates
• OpenPOWER – Power ISA, an open-source hardware instruction set architecture (ISA) 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
• SparkFun Electronics – microcontroller development boards, breakout boards
• The Bus Pirate – universal bus interface and programmer
• Turris Omnia – open-source SOHO network router
• RISC-V – an open-source hardware instruction set architecture (ISA)
• MIPS – a reduced instruction set computer (RISC) instruction set architecture
• Color Maximite – open-source single-board computer running the BASIC language as its operating system and compatible with Arduino Uno micro-controller peripherals
• Humane Reader and Humane PC

• Nitrokey – USB key for data and email encryption and strong authentication

• 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
• Thymio – robot for education

• 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

• 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^[2]

• Amber is an ARM-compatible 32-bit RISC processor. Amber implements the ARMv2 instruction set.
• LEON, a 32-bit, SPARC-like CPU created by the European Space Agency
• OpenPOWER, based on IBM's POWER8 and newer multicore processor designs
• OpenSPARC, a series of open-source microprocessors based on the UltraSPARC T1 and UltraSPARC T2 multicore processor designs
• Parallax P8X32A Propeller is a multicore microcontroller with an emphasis on general-purpose use
• ZPU, a small, portable CPU core with a GCC toolchain. It is designed to be compiled targeting FPGA^[3]
• OpenRISC 1200, an implementation of the open source OpenRISC 1000 RISC architecture

• Open Source Ecology

• Wind turbines

• LED Throwies – nondestructive graffiti and light displays

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

• Rally Fighter – made by Local Motors
• Riversimple Urban Car
• OpenXC
• OScar
• Wikispeed
• OSVehicle Tabby^[4]

• MakerPlane

• SECU-3 – gasoline engine control unit

• OpenEVSE – charger for electric cars^[5]

• 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

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

• Multimachine – machine tool project
• 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)

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

• Open-Source Lab – documents dozens of scientific tools, but is closed-source itself
• OpenBCI – EEG amplifier^[4]

• UPSat

Hardware that uses closed source components

• Tinkerforge RED Brick, executes user programs and controls other Bricks/Bricklets standalone

• Banana Pi, uses low-power processors with an ARM core; runs Linux, Android, and OpenWRT
• BeagleBoard, uses low-power Texas Instruments processors with an ARM Cortex-A8 core; runs Ångström distribution (Linux)
• IGEPv2, an ARM OMAP 3-based board designed and manufactured by ISEE in Spain. Its expansion boards are also open-source.
• OLinuXino, designed with KiCad by OLIMEX Ltd in Bulgaria^[6]
• PandaBoard, a variation of the BeagleBoard
• Rascal, an ARM based Linux board that works with Arduino shields, with a web server that includes an editor for users to program it in Python. Hardware design files released under the Creative Commons BY-SA license.
• 96Boards (includes but not limited to, DragonBoard 410c, HiKey, HiKey960, Bubblegum-96 and more...)
• Parallella single-board computer with a manycore coprocessor and field-programmable gate array (FPGA)

• Arduino – open-source microcontroller board

• Minimig – a re-implementation of an Amiga 500 using a field-programmable gate array (FPGA).

• PC532, a personal computer design released in 1990, based on the NS32532 microprocessor

• HiFive1 is an Arduino-compatible development kit featuring the Freedom E310, the industry's first commercially available RISC-V SoC^[7]
• HiFive Unleashed is a Linux development platform for SiFive’s Freedom U540 SoC, the world’s first 4+1 64-bit multi-core Linux-capable RISC-V SoC."^[8]

• Novena, a notebook computer that uses a 1.2 GHz quad-core Freescale processor closely coupled with a Xilinx FPGA^{[9][10][11][12]}
• VIA OpenBook, a netbook case design released by VIA Technologies

• Ben NanoNote, a palmtop PC based on the MIPS architecture
• Openmoko, a smartphone containing a single-board computer equipped with a GSM/UMTS modem
• Simputer, a handheld computer released in 2002

• J-Core, an implementation of the SuperH with some extensions^[13][14]
• 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

• 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.

• Open-Source Lab: How to Build Your Own Hardware and Reduce Research Costs (2014)
• Thingiverse, open-source designs of objects, many of which are 3D-printable
• Open-source hardware
• List of open-source first-person shooters
• List of open-source mobile phones
• List of open-source video games
• Open-source robotics
• Modular smartphone
• Open Source Ecology
• Telecom Infra Project