A curated list of repos related to Circom.

• Cryptographic primitives
  • In Circom
  • In other languages
• Provers
• Code editors
• Tutorials & docs
• Papers
• Projects using Circom

• circomlib - main 'standard lib' in Circom
• circom-ecdsa - secp256k1 ECDSA operations
• circom-pairing - BLS12-381 curve
• zk-attestor - Scalable on-chain trustless attestations to data from any past Ethereum block or state (ethereum storage proofs)
• keccak256-circom - keccak256 implementation

Cryptographic primitives implemented in other languages which are compatible with Circom implementations

• Javascript
  • circomlibjs - Javascript library to work with circomlib circuits
• Go
  • go-iden3-crypto - Poseidon & mimc hash, babyjubjub elliptic curve
  • arbo - Efficient MerkleTree compatible with circomlib, which parallelizes computation by CPUs
  • go-merkletree - MerkleTree compatible with circomlib
• Rust
  • poseidon-rs - Poseidon hash function compatible with circomlib
  • babyjubjub-rs - BabyJubJub elliptic curve compatible with circomlib

• snarkjs - zkSNARK implementation in JavaScript & WASM
• rapidsnark - zkSNARK proof generation written in C++ and intel assembly
• ark-circom - Arkworks bindings to Circom's R1CS, for Groth16 Proof and Witness generation in Rust
• go-circom-prover-verifier - Go implementation of the Groth16 zkSNARK Prover and Verifier compatible with Circom
• go-circom-witnesscalc - Witness Calculator in go, calling WASM

• zkrepl - Online playground for Circom circuits
• vscode plugin - VSCode syntax highlighting plugin
• vim plugin - Vim syntax highlighting plugin

• docs.circom.io - official Circom docs
• Circom & Snarkjs talk - Jordi Baylina's talk at zkSummit 2019
• Electron Labs - Intro to Circom - Usage of language syntax and programming practices
• BattleZips Zero Knowledge Crash Course - Tutorial on building a battleship game on Ethereum & Circom
• Introduction to Zero Knowledge Proof - Tutorial inspired by the presentation "All About the ZkVerse | Polygon" performed by Jordi Baylina at EthDenver22

Papers on Circom related constructions and primitives implemented in the circomlib standard library

• CIRCOM: A Robust and Scalable Language for Building Complex Zero-Knowledge CircuitsComplex Zero-Knowledge Circuits
• Sparse Merkle Trees
• Baby Jubjub Elliptic Curve & EIP-2494
• Poseidon: A New Hash Function for Zero-Knowledge Proof Systems

• hermeznetwork/circuits - Hermez network circuits
• iden3/circuits - Circom circuits used by the iden3 core protocol
• appliedzkp/maci - Minimal anti collusion infrastructure
• appliedzkp/semaphore - A privacy gadget for creating anonymous proof of membership on Ethereum
• tornadocash/tornado-core - Non-custodial private transactions on Ethereum
• worldcoin/semaphore-rs - Rust support library for using semaphore
• 0xPARC/zk-group-sigs - Group signatures implemented with zkSNARKs
• vocdoni/zk-franchise-proof-circuit - Census proof anonymous voting circuit