CoinJoin Implementations
- Wasabi Wallet - Privacy-focused Bitcoin wallet with Chaumian CoinJoin
- Wasabi Wallet GitHub - Open source .NET implementation
- Wasabi 2.x - Next-gen CoinJoin with enhanced detection resistance
- WabiSabi protocol - Flexible CoinJoin with blind signatures, not just equal-output
- WalletWasabi/WabiSabi - Anonymous credential scheme and protocol materials for coordinated CoinJoin transactions
- JoinMarket - Decentralized CoinJoin marketplace — market makers earn fees
- Jam - Web UI for JoinMarket
- Whirlpool - Chaumian CoinJoin implementation based on modified ZeroLink theory
Payjoin (P2EP)
- BIP 78: Payjoin - Pay-to-endpoint: receiver contributes inputs to a payment transaction
- Payjoin Dev Kit - Tools for integrating Payjoin into wallets
- BIP 77: Async Payjoin - Payjoin v2 using encrypted store-and-forward directory servers and OHTTP
- Payjoin v2 Guide - Implementation-oriented explanation of asynchronous Payjoin
- payjoin - Rust library for BIP 78 Payjoin
Bitcoin Privacy Tools
- Samourai Wallet - Privacy toolkit with Stonewall, Ricochet (note: developers arrested 2024)
- Silent Payments (BIP 352) - Reusable payment codes without address reuse
- BIP352 Index Server Specification - Work-in-progress API spec for Silent Payments wallet scanning services
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BIP 47: Reusable Payment Codes - Payment codes for static payment addresses
- Sparrow Wallet - Desktop Bitcoin wallet focused on security, privacy, and coin control
- Ashigaru - Open-source privacy-first Bitcoin wallet forked from Samourai Wallet (Tor-only)
Privacy Research
- Bitcoin Privacy wiki - Comprehensive Bitcoin privacy guide
- An Analysis of Non-Deterministic Wallets - Address clustering and privacy leakage
- CoinJoin research - Academic analysis of CoinJoin transaction patterns