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+401 starsfrom 7,492 · score 6.00
2.WalletWasabi / WalletWasabiOpen-source, non-custodial, privacy preserving Bitcoin wallet for Windows, Linux, and Mac.bitcoin-walletprivacybitcoindotnetnbitcoincross-platform+7 moreC#MIT2.6K total576 forks+130 starsfrom 2,506 · score 4.88
4.MetacoSA / NBitcoinComprehensive Bitcoin library for the .NET framework.C#MIT1.9K total870 forks+8 starsfrom 1,930 · score 2.20