The complete and regularly updated list of the best resources to learn Bitcoin

Bitcoin

Utilities

  • BitKey Live USB for airgapped transactions and Bitcoin swiss army knife
  • Pycoin Python-based Bitcoin and alt-coin utility library.
  • sx sx - command line Bitcoin to empower the sysadmin
  • bx Bitcoin Command Line Tool
  • txwatcherA little Python utility that lets you monitor Bitcoin addresses through Blockchain Websocket API and perform custom callbacks.
  • hellobitcoin A collection of simple programs which can generate bitcoin wallets, create and sign transactions, and send transactions over the bitcoin network.
  • Mining visualization

Blockchain API and Web services

Wallets API

Open Source Wallets

Blockchain Explorers

C++ Libraries

JavaScript Libraries

PHP Libraries

Ruby Libraries

Python Libraries

  • BlockTrail SDK Python
  • btctxstore simple library to store/retrieve information in bitcoin transactions using OP_RETURN
  • pybitcointools Python library for Bitcoin signatures and transactions from Vitalik Buterin. Project discontinued.
  • pycoin Python library for Bitcoin keys, signatures, transactions. Includes full VM implementation and tools for manipulating keys (ku) and transactions (tx).
  • bitcoin_tools Python library for building and analyzing transactions and scripts (both standard and custom). Comes along with a UTXO set analysis tool. Includes several examples and exhaustive documentation.

Java Libraries

  • BitcoinJ
  • XChange Library that provides a simple and consistent API for interacting with 50+ Bitcoin currency exchanges.

.Net Libraries

  • NBitcoinComprehensive Bitcoin library for the .NET framework.
  • BitcoinLib The most complete, up-to-date, battle-tested .net Library and RPC Wrapper for Bitcoin and Altcoins in C#.
  • QBitNinja An Open Source and powerful blockchain API

Playgrounds

Blockchain dump

  • WebBTC These are postgres database dumps of the bitcoin-ruby-blockchain database generated by webbtc.com.
  • BitcoinDatabaseGenerator A high performance data transfer tool that can be used to copy data from Bitcoin Core blockchain files to a SQL Server database
  • Blockparser+SQL Fast, quick and dirty bitcoin blockchain parser
  • BitcoinABE Abe: block browser for Bitcoin and similar currencies
  • NBitcoin.Indexer Scalable and fault-tolerant block chain indexer for Azure cloud platform.
  • Blockchain2Graph Graph Database Builder

Full nodes

  • Bitcoinjs-server Bitcoin network node in JavaScript using Node.js / LevelDB
  • Bitcoin-ruby-node bitcoin node based on bitcoin-ruby-blockchain
  • Toshi by Coinbase An open source Bitcoin node built to power large scale web applications
  • Fullnode Javascript implementation of bitcoin
  • Insight API A bitcoin blockchain API for web wallets
  • Bitcoind.JS bitcoind linked to node.js by BitPay
  • Bitcore Formerly just a Nodejs library, now a full node

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Let's Play Nice, USA
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