Open Source C++ Bitcoin Software

Bitcoin is a decentralized P2P electronic cash system without a central server or trusted parties. Users hold the crypto keys to their own money and transact directly with each other, with the help of the network to check for double-spending.

Bitcoin Armory is an advanced Bitcoin wallet management platform focused on security, cold storage, and power-user features. Designed for technically inclined users, it provides tools for managing private keys offline, signing transactions without exposing wallets to the internet, and creating air-gapped setups. Armory offers multi-signature support, deterministic wallets, and secure backups, making it suitable for enterprise-grade or high-value Bitcoin storage.

Bitcoin Core connects to the Bitcoin peer-to-peer network to download and fully validate blocks and transactions. It also includes a wallet and graphical user interface, which can be optionally built. Bitcoin Core requires a one-time download of about 400GB of data plus a further 5-10GB per month. By default, you will need to store all of that data, but if you enable pruning, you can store as little as 6GB total without sacrificing any security. For more information about setting up Bitcoin Core, please read the full node guide. Download verification is optional but highly recommended. Performing the verification steps here ensures that you have not downloaded an unexpected or tampered version of Bitcoin, which may result in loss of funds. Experienced users who don't mind performing additional steps can take advantage of Bitcoin Core's reproducible builds and the signed checksums generated by contributors who perform those builds.

The goal of Bitcoin ABC is to create sound money that is usable by everyone in the world. We believe this is a civilization-changing technology which will dramatically increase human flourishing, freedom, and prosperity. The project aims to achieve this goal by implementing a series of optimizations and protocol upgrades that will enable peer-to-peer digital cash to scale many orders of magnitude beyond current limits. eCash is a digital currency that enables instant payments to anyone, anywhere in the world. It uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. eCash is a descendant of Bitcoin. Bitcoin ABC is the name of open-source software which enables the use of eCash. It is a fork of the Bitcoin Core software project.

Zcash is the future of money-- digital, decentralized and private. It is an implementation of the "Zerocash" protocol; a digital currency based on Bitcoin's code, but with a higher standard of privacy. Like Bitcoin, Zcash transaction data is posted to a public blockchain. However unlike Bitcoin, your personal and transaction data stay completely private. Thanks to a sophisticated zero-knowledge proving scheme, transactions can be verified without showing any information at all about the sender, receiver or transaction amount. Selective disclosure features are available for users who may need these for compliance or audit purposes. Zcash was built by top cryptographers, with an underlying protocol based on the research of scientists from MIT, Technion, Johns Hopkins, Tel Aviv University and UC Berkeley.

QwartzNetwork - OpenSource Blockchain Project You can help Qwartz Network to be listed on any exchange you know ! If you want support QwartzNetwork, you can send 0.0014 BTC to 1CEs9bwRiS8Zx9mZ1s7BZxkyfsumGoSuNT for node Create following file: C:/user/"YourName"/AppData/Roaming/Qwartz/qwartz.conf : rpcuser=rpc_qwartz rpcpassword=31c23561720bf04415ecac27d rpcallowip=127.0.0.1 rpcport=7531 listen=1 server=1 txindex=1 addnode=109.17.195.223 addnode=199.247.8.70 Or type in debug console the following command addnode 109.17.195.223 add addnode 199.247.8.70 add MasterNodes/PoW Max Supply: 18M No Premine No ICO Genesis Block QWARTZ : QazfipxkgNxnWjgkdSfUkSuxYKsBj4n4nL BTC : 1HkL1nLetBqcnFbhzv8XtZE2b6GkT83W8Q LTC : LeMe2RijstRvEyEdS81FsPoRGWMr4FpCk5 ETH/ERC: 0x95710f9793d85cE28B4Da5115C2f8A51DFaebeC7

Sterlingcoin is a digital currency used to pay for goods or services in daily life both offline and online. It is a decentralised system controlled by an open market and not by a corporation, bank or government. Because of its decentralisation everyone who runs the Sterlingcoin wallets shares the public ledger*. Sterlingcoin is a completely fair**, transparent and a highly secure form of currency for all needs. The price of Sterlingcoin is determined by supply & demand, use, trading and mining***. *Transaction history of every Sterlingcoin wallet **A limited supply of money would allow for a better economy; where ‘better’ means ‘fairer’, more stable and devoid of government intervention. ***Maintaining the block chain is called mining, and those who do so are rewarded with newly created Sterlingcoin and transaction fees.

Metrocoin is an experimental new digital currency that enables instant payments to anyone, anywhere in the world. Metrocoin uses peer-to-peer technology to operate with no central authority: managing transactions and issuing money are carried out collectively by the network. Metrocoin is also the name of the open source software which enables the use of this currency.

Polish Mark (PLM) is an open cryptocurrency, formerly Q-coin (www.q-coin.org), is completely Polish idea and product, created on the basis of science (Information Theory) and philosophy - Informationism. More about Polish Mark discover the web site www.markapolska.org. There is also the source code of the wallet https://github.com/wonabru/qcoin or https://github.com/wonabru/Q, so you can connect to the network and register your account with the name in the network of Polish Mark.

Qtum is a decentralized blockchain project built on Bitcoin's UTXO model, with support for Ethereum Virtual Machine-based smart contracts, and secured by a proof of stake consensus model. It achieves this through the revolutionary Account Abstraction Layer which allows the EVM to communicate with Qtum's Bitcoin-like UTXO blockchain. Welcome to the Qtum Ignition Main Network. This is the main network where the tokens hold value and should be guarded very carefully. If you are testing the network or developing unstable software on Qtum, we highly recommend using either testnet or regtest mode. A Proof of Stake consensus system which is optimized for Qtum's contract model. Any user can stake and help to secure the network. There is no voting, master nodes, or minimum amount required. There have been transactions as small as 2 Qtum that have created blocks in the past. Staking from smart contracts is under development.

This is application for Bitcoin (BTC) mining with CUDA-capable videocards. This project is actually a mod of puddinpop's original RPCMiner.

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