YosysHQ/picorv32

A FPGA friendly 32 bit RISC-V CPU implementation

Open-source high-performance RISC-V processor

Rocket Chip Generator

Build your hardware, easily!

Learning FPGA, yosys, nextpnr, and RISC-V

A graphical processor simulator and assembly editor for the RISC-V ISA

Chisel: A Modern Hardware Design Language

RISC-V Instruction Set Manual