1.btcpayserver / btcpayserverAccept Bitcoin payments. Free, open-source & self-hosted, Bitcoin payment processor. bitcoinbitcoin-payment-gatewaylightning-networkpayment-gatewaybitcoin-payment-processorcrowdfunding+2 moreC#MIT7.9K total2.1K forks+228 starsfrom 7,662 · score 5.43
2.WalletWasabi / WalletWasabiOpen-source, non-custodial, privacy preserving Bitcoin wallet for Windows, Linux, and Mac.bitcoin-walletprivacybitcoindotnetnbitcoincross-platform+7 moreC#MIT2.6K total574 forks+59 starsfrom 2,577 · score 4.09
4.MetacoSA / NBitcoinComprehensive Bitcoin library for the .NET framework.C#MIT1.9K total869 forks+3 starsfrom 1,934 · score 1.39