XChange is a Java library providing a simple and consistent API for interacting with 60+ Bitcoin and other crypto currency exchanges providing a consistent interface for trading and accessing market data.
 
A complete list of implemented exchanges, data providers and brokers can be found on our <a href="https://github.com/timmolter/XChange/wiki/Exchange-Support">Exchange Support</a> page.

XChange is a Java library providing a simple and consistent API for interacting with 60+ Bitcoin and other crypto currency exchanges providing a consistent interface for trading and accessing market data.

XChange - Java library for interacting with 60+ Bitcoin and other crypto currency exchanges

Bitcoin uses peer-to-peer technology to operate with no central authority or banks; managing transactions and the issuing of bitcoins is carried out collectively by the network. Bitcoin is open-source; its design is public, nobody owns or controls Bitcoin and everyone can take part. Through many of its unique properties, Bitcoin allows exciting uses that could not be covered by any previous payment system.

Bitcoin - Most popular Crypto Currency

CCXT – CryptoCurrency eXchange Trading Library. A JavaScript / Python / PHP library for cryptocurrency trading and e-commerce with support for many bitcoin/ether/altcoin exchange markets and merchant APIs. The CCXT library is used to connect and trade with cryptocurrency / altcoin exchanges and payment processing services worldwide. It provides quick access to market data for storage, analysis, visualization, indicator development, algorithmic trading, strategy backtesting, bot programming, webshop integration and related software engineering.

CCXT - A JavaScript / Python / PHP cryptocurrency trading library with support for more than 100 bitcoin/altcoin exchanges

Bitcore is a infrastructure to build Bitcoin and blockchain-based applications for the next generation of financial technology. It is a full bitcoin node, your apps run directly on the peer-to-peer network. For wallet application development, additional indexes have been added into Bitcoin for querying address balances, transaction history, and unspent outputs.

bitcore - A full stack for bitcoin and blockchain-based applications

Ta4j is an open source Java library for technical analysis. It provides the basic components for creation, evaluation and execution of trading strategies. It is a powerful engine for building custom trading strategies. It supports more than 130 technical indicators (Aroon, ATR, moving averages, parabolic SAR, RSI, etc.). 

Ta4j - Technical Analysis for Java

K.sh is a very low latency market making trading bot with a full featured web interface, it directly connects to several cryptocoin exchanges. On a decent machine reacts to market data by placing and canceling orders in under milliseconds.

Krypto-trading-bot - Self-hosted crypto trading bot (automated high frequency market making) in node

BTCPay Server is a self-hosted, open-source cryptocurrency payment processor, which allows you to accept bitcoin without fees or intermediaries.. It's secure, private, censorship-resistant and free. 
 
Features: 
<ul>
<li>Direct, peer-to-peer Bitcoin payments</li>
<li>No transaction fees (other than the <a href="https://en.bitcoin.it/wiki/Miner_fees" rel="nofollow">network fee</a>)</li>
<li>No fees, middleman or KYC</li>
<li>Non-custodial (complete control over the private key)</li>
<li>Enhanced privacy &amp; security</li>
<li>Self-hosted</li>
<li>SegWit support</li>
<li>Lightning Network support (LND, c-lightning, Eclair, and Ptarmigan)</li>
<li>Tor support</li>
<li>Share your instance with friends (multi-tenant)</li>
<li>Invoice management and Payment requests</li>
<li>Apps: Point of sale, crowdfunding, donation button</li>
<li>Full-node reliant wallet with <a href="https://docs.btcpayserver.org/Vault/" rel="nofollow">hardware wallet integration</a> and SegWit support</li>
<li>Bitcoin-only build, separate community-maintained altcoin build (<a href="https://docs.btcpayserver.org/FAQ/FAQ-Altcoin/" rel="nofollow">supported altcoins</a>)</li>
</ul>

BTCPay Server is a self-hosted, open-source cryptocurrency payment processor, which allows you to accept bitcoin without fees or intermediaries.. It's secure, private, censorship-resistant and free. 



BTCPay Server - Accept Bitcoin payments

Bit is Python's fastest Bitcoin library and was designed from the beginning to feel intuitive, be effortless to use, and have readable source code. 
 
Its features include: 
<ul>
<li>Python's fastest available implementation (100x faster than closest library)</li>
<li>Seamless integration with existing server setups</li>
<li>Supports keys in cold storage</li>
<li>Fully supports 25 different currencies</li>
<li>First class support for storing data in the blockchain</li>
<li>Deterministic signatures via RFC 6979</li>
<li>Access to the blockchain (and testnet chain) through multiple APIs for redundancy</li>
<li>Exchange rate API, with optional caching</li>
<li>Optimal transaction fee API, with optional caching</li>
<li>Compressed public keys by default</li>
<li>Multiple representations of private keys; WIF, PEM, DER, etc.</li>
<li>Standard P2PKH transactions</li>
</ul>

Bit is Python's fastest Bitcoin library and was designed from the beginning to feel intuitive, be effortless to use, and have readable source code. 

Bit - Bitcoin made easy.

Copay is a secure bitcoin wallet platform for both desktop and mobile devices. The Copay app securely stores multiple, distinct bitcoin wallets, allowing both business and privacy-conscious users to keep funds carefully separated. It makes sharing a wallet simple and secure. It is one of the first bitcoin wallets to support the full Bitcoin Payment Protocol (BIP 0070-0073). 
 
When you send money to a Payment Protocol-enabled merchant, Copay securely verifies that your payment will go to the right place. It has support for over 150 currency pricing options and unit denomination in BTC or bits.

Copay is a secure bitcoin wallet platform for both desktop and mobile devices. The Copay app securely stores multiple, distinct bitcoin wallets, allowing both business and privacy-conscious users to keep funds carefully separated. It makes sharing a wallet simple and secure. It is one of the first bitcoin wallets to support the full Bitcoin Payment Protocol (BIP 0070-0073). 

Copay - The Secure, Shared Bitcoin Wallet

Bcoin is an alternative implementation of the bitcoin protocol, written in node.js. Although still in a beta state, bcoin is well tested and aware of all known consensus rules. It is currently used in production as the consensus backend and wallet system for purse.io.

Bcoin - Javascript bitcoin library for node.js and browsers

TechAn is a technical analysis library for Go! It provides a suite of tools and frameworks to analyze financial data and make trading decisions. Techan is heavily influenced by the great ta4j.  It provides Basic and advanced technical analysis indicators, Profit and trade analysis and Strategy building.

TechAn - Technical Analysis Library for Golang

Flipstarter provides a way for any project to engage with potential funders in a way that encourages accountability for projects and fairness for funders. It is built on Bitcoin Cash.



Flipstarter - Peer to Peer Crowdfunding

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