Open-source alternatives to Nethermind

This project is a collection of blockchain tools providing an Ethereum client node, a virtual machine runtime for smart contract execution, a blockchain wallet manager, and a programmatic network interface. It implements the necessary components to synchronize blockchain state, validate blocks, and process transactions on the Ethereum network. The software includes a dedicated command line interface for managing node operations and monitoring network status. It features a comprehensive suite of cryptographic utilities for generating account keypairs, managing encrypted secret stores, and sign

Parity is an Ethereum client node implementation designed to run a full node, validate blocks, and maintain a local copy of the blockchain. It functions as a blockchain state engine that executes smart contracts and manages distributed ledger state through a peer-to-peer network. The project includes a synchronization engine to download and verify historical block data to reach current network height and a cryptographic key manager for generating and storing private keys used to sign transactions. The system covers distributed ledger interaction via a command line interface for querying netw

NBitcoin Explorer

Aleth is an Ethereum C++ client and full-node implementation. It provides a virtual machine executor for running and debugging bytecode, a blockchain state debugger, and a serialization library for encoding and decoding data using the Recursive Length Prefix format. The project includes a dedicated mining tool for producing blocks and benchmarking hashing hardware performance. It further distinguishes itself with a state debugger that analyzes pre- and post-execution state changes and generates step-by-step execution traces for the virtual machine. The implementation covers node operations i

A Python implementation of the Ethereum Virtual Machine

Ethereum implementation on the efficiency frontier

Integrated Ethereum implementation and tool suite focused on Solidity testing and development.

Cross platform C# library for talking to the Trezor hardwarewallet

Comprehensive Bitcoin library for the .NET framework.

NEO Smart Economy

(deprecated) The fast, light, and robust client for the Ethereum mainnet.

a native library implementing secp256k1 purely for the crystal language.

Bitcoin full node in C#

Full featured library for Ethereum interaction with the JSON RPC API in swift. Native ABI parsing and smart contract interactions.

Bitcoin protocol toolkit for Swift

EthereumKit is a free, open-source Swift framework for easily interacting with the Ethereum.

Fastest Ethereum archive node ever built

Open-source, non-custodial, privacy preserving Bitcoin wallet for Windows, Linux, and Mac.

To be the go to platform for building dApps quickly and cheaply for business and gaming

A pure swift Ethereum Web3 library

BTCPay Server is a non-custodial payment gateway and invoice manager designed for accepting Bitcoin and other cryptocurrencies directly into a private wallet. It serves as a self-hosted payment infrastructure that allows merchants to manage digital invoicing and storefronts without relying on third-party intermediaries. The system distinguishes itself through a non-custodial wallet architecture that ensures private keys remain on the user's own hardware or server. It integrates the Lightning Network for instant, low-cost transactions and provides a hardware-wallet signing bridge to secure tra

Rapid blockchain prototyping