Free Hardware Projects

Organizations

Free Software Foundation Europe (FSFE)
Open Source Society University (OSSU)

Production Computers

Laptops

Novena Laptop
MNT Reform
GNU/Linux PowerPC Notebook
T-Head ROMA Laptop

Motherboards

Milk-V Pioneer (SG2042)

Single Board Computers

StarFive VisionFive 2 (has a GPU; Compares to RPi 4, but with a GPU; JH7110 SoC = 4x FU740 + IT GPU)
Pine64 Star64 (JH7110 + WiFi)
Milk-V Mars (JH7110)
BananaPi JH7110 based
Milk-V Meles (TH1520)
BeagleBoard Beagle-V Ahead (TH1520)
Sipeed LicheePi 4A (TH1520; Also has tablet, workstation array and console form factors for the LM4A board)
Planned Sipeed SBC based on C908 with RVV Extensions v1.0 (https://twitter.com/SipeedIO/status/1654055669774036993/photo/1)
Milk-V Jupiter (SpacemiT-K1)

Processors

SoC

AMIGA Chipset SoC
LibreSoC
Rocket Chip SoC Generator (Has Rocket Core and other CPUs, can also add custom cores)
StarFive JH7110 (4x SiFive FU740 + Imagination Tech GPU)
Alibaba T-Head TH1520 (4x XuanTie C910 + Imagination Tech BXM-4-64 GPU + 4 TOPS NPU)
StarFive JH8100 (upcoming, 12nm)
SOPHON SG2042 (64 x C920; RV V Extension 0.7.1)
SpacemiT (RVV Extensions 1.0.0)
XiangShan V3
VRoom! (may not release)
SonicBOOM

Verilog Simulations: See Readme here: https://github.com/openhwgroup/cva6 (can execute helloworld.c in Simulator)

CPU

Shakti Open Core
XuanTie by T-Head
SiFive (U74 is in SiFive Essential 7 Series; can run Linux)
Rocket Core (By SiFive, UCB and CHIPS Alliance; included with Rocket Chip Generator)
BOOM (Berkeley Out of Order Machines; By UCB)
asics.ws Cores
Pile of Cores (PoC; VLSI-EDA/PoC on GitHub)
FOSS CPU Cores

Some RISC-V Comparison Overview
RISC V Core Comparison.avif

GPU

MIAOW GPGPU Core
asicguy/gplgpu on GitHub

FPGA

Note

FPGA Cores can be implemented on FPGA development boards. Also, a compiled FPGA project is only supported on that toolchain, and if it is not open-source, the only way others can use it is by reverse engineering.
FPGA Development boards are based on FPGA Fabrics. The bitstreams associated with the FPGA Fabrics are usually proprietary and compiled using vendor software, but reverse engineering projects have led to the availability of open source development boards.

FPGA Design Tooling

Steps: Verilog RTL > [Synthesis] > Netlist > [Place and Route] > Config > [Translate] > Bitstream

OpenFPGA - A complete FPGA development framework
F4PGA by CHIPS Alliance (formerly SymbiFlow)
- Synthesis Tool: Yosys Open SYnthesis Suite
- Place and Route Tool: Yosys nextpnr
Enjoy-Digital LiteX (See FOSDEM 2023: https://archive.fosdem.org/2023/schedule/event/fpga_bitstreams/))

Note

OSHW Guidelines: https://www.oshwa.org/best-practices-for-sharing-fpga-designs-2/

Note

ASIC and FPGA EDA Tooling has three components: Hardware Description, Backend and Frontend

Hardware Description: Verilog, VHDL, Chisel, etc.
Backend: ASIC/FPGA Tooling, Verification, Testing and Simulation
Frontend: Synthesis Tools

FPGA Development Boards

The FPGA bitstreams are vendor secrets, and open source development boards are made by reverse engineering various core bitstreams.

Radiona ULX3S (Lattice ECP5 based; 4 variants - ECP5 12k-84k LUTs)
OrangeCrab FPGA
iCEBreaker FPGA (Lattice iCE40 based)
Embedded Micro Mojo V3 FPGA

FPGA Fabrics

Companies: Lattice Semiconductor, Microchip, Xilinx, Intel, Analog Devices, QuickLogic

Designs

Organizations

OpenCores.org
CHIPS Alliance
LibreSilicon

Sub-organizations

Digilent Vivado IPs (e.g. Pmod BLE)
Redwood EDA TL-Verilog
Redwood EDA Makerchip

Designs

WISHBONE Bus
lowRISC
PowerPC
NVIDIA NVDLA
RISC-V
OpenRISC

Manufacturing

Skywater PDK

Educational

Ben Eater's 8-bit Computer
DERULF's 8-bit Computer (based on Ben Eater's)

Peripherals

Radio

openwifi SDR (based on Vivado)
MyriadRF SDR
Xilinx Zynq based SDRs (Xilinx is not open hardware)

Software

NVIDIA PhysX

Software:

Open Algorithm	Open Core	Open Source	Open License

Hardware:

Open Firmware	Open Circuit Board	Open Hardware	Open Case Design	Open License