Vitalik Buterin's recent proposal to expand the execution layer of future ETH, especially Risc-V and ZK Risc-V, has received a lot of attention. There are still many projects in the zkvm arena, some of which are self built instruction sets, and some are traditional instruction sets (mips, risc-v, wasm, etc.). To classify them, let me briefly introduce them: 1/RISC-V Instruction Set - Bogum 2.0 -OpenVM @ axiom_xyz team's transformation to zkvm - Risc0 zkVM