https://github.com/MetacoSA/NBitcoin
https://github.com/stratisproject/StratisBitcoinFullNode
dotblock is used by CoinVault and supports Bitcoin and Altcoin blockchains which are forkes of the Bitcoin protocol
- Signing transactions (with support for altcoins)
- Creating Bitcoin addresses
- Mnemonic sentances
- Generating HD keys (BIP32) and coin types (BIP44 accounts)
- RPC client implementation
- Multi sig transactions (and SegWit)
- SPV wallets
- Supporting Ethereum