Ibex is a small 32 bit RISC-V CPU core, previously known as zero-riscy.

CV32E40P is an in-order 4-stage RISC-V RV32IMFCXpulp CPU based on RI5CY from PULP-Platform

RSD: RISC-V Out-of-Order Superscalar Processor

SCR1 is a high-quality open-source RISC-V MCU core in Verilog

A directory of Western Digital’s RISC-V SweRV Cores