RISC-V BOOM
SonicBOOM: The Berkeley Out-of-Order Machine
...It is capable of booting Linux and running standard benchmarks, and its performance (measured in CoreMarks/MHz) is competitive with commercial cores. The project is intended primarily for hardware/architecture research and teaching, rather than production silicon, and typically is used in conjunction with SoC frameworks (for example via Chipyard) to integrate BOOM into larger systems.