Software

Bitcoin clients

 * Main article and feature comparison: Clients


 * Bitcoin-Qt - C++/Qt based tabbed UI. Linux/MacOSX/Windows. Full-featured thick client that downloads the entire block chain, using code from the original Bitcoin client.
 * bitcoind - GUI-less version of the original Bitcoin client, providing a JSON-RPC interface
 * MultiBit - lightweight thin client for Windows, MacOS and Linux with support for opening multiple wallets simultaneously
 * Electrum - a "blazing fast, open-source, multi-OS Bitcoin client/wallet with a very active community" - also a thin client.
 * Bitcoin-js-remote - JavaScript RPC client, support for QR codes
 * Bitcoin WebUI - JavaScript RPC client
 * Bitcoin Webskin - PHP web interface to bitcoind
 * subvertx - command line bitcoin tools
 * Bitcoiner - Java RPC client (Android)
 * Armory - Python-based client currently in beta-level
 * Spesmilo - Python/PySide RPC client (abandoned)
 * Gocoin - WebUI client written in Go language, with a cold deterministic brain-wallet.
 * btcd An alternative full node bitcoin implementation written in Go (golang).
 * BlockCypher Full node bitcoin client built for scale and data centers, exposed through web APIs.

Frontends to eWallet

 * Blockchain - Javascript bitcoin client with client side encryption.
 * xCoinMoney Advanced API to create invoices for subscription.

Experimental

 * Freecoin - C++ client, supports alternative currencies like Beertoken
 * BitDroid - Java client
 * Bitdollar - C++/Qt client, unstable beta version

Shopping Cart Integration in eCommerce-Systems

 * GoCoin - Plugin for WooCommerce support and coming soon Magento
 * Zen Cart Bitcoin Payment Module - a payment module that interacts with bitcoind for the Zen Cart eCommerce shopping chart.
 * Coinbase Shopping Cart Plugins - Supports Wordpress, WooCommerce, Magento, Zencart, WP e-commerce, and more.
 * Karsha Shopping Cart Interface - is a mobile payment-interface which enables its users to accept payments.
 * Bitcoin-Cash - an easy to use payment module for xt:Commerce
 * BitPay - bitcoin plugins for Magento, Opencart, Zencart, PHP, JSON API
 * WalletBit - Plugins for PrestaShop, OpenCart, PHP, JSON API
 * xCoinMoney Advanced API for instant payment and subscriptions
 * OpenCart Bitcoin - An OpenCart payment module that communicates with a bitcoin client using JSON RPC.
 * MCS_200by200_logo-01.png Coin Solution - Bitcoin consulting services and solutions; custom payment integrations
 * OsCommerce Bitcoin Payment Module - a payment module that uses a python monitoring script to interact with bitcoind for OsCommerce
 * Drupal Ubercart Bitcoin payment method enables you to accept Bitcoin as payment for your Drupal/Ubercart enabled website product/services.

Enterprise server

 * Apicoin First bitcoin PaaS (Platform as a Service)
 * Bits of Proof - a modular enterprise-ready implementation of the Bitcoin protocol.
 * BlockCypher Full node bitcoin client built for scale and data center environments.

Web apps

 * MyTakin - Wallet System, Bitcoin and Cryptocurrencies Exchange, Buy and Transfer Bitcoins.
 * Bitcoin Central - currency exchange
 * Coinbase - an international digital wallet that allows you to securely buy, use, and accept bitcoin currency
 * Coinnext - Cryptocurrency Exchange
 * Bitcoin Poker Room - poker site
 * Abe - block chain viewer
 * Simplecoin - PHP web frontend for a pool
 * bitcoin simple php tools simple php tools for webmasters
 * CoinSummary - multi-coin wallet manager with built-in valuation in Bitcoin and major world currencies.
 * HolyTransaction -  the Universal cryptocurrency wallet and instant exchange
 * Flyp.me Accountless Exchange

White label software

 * draglet - Bitcoin Exchange Software / white label solution
 * Sellbitbuy- Cryptocurrency Exchange solution/ white label exchange software
 * Merehead - Cryptocurrency exchange software
 * Coinsclone - Cryptocurrency Exchange Software / white-label exchange software

Browser extensions

 * Bitcoin Extension - check balance and send bitcoins (Chrome)
 * Bitcoin Prices (extension) - monitoring price (Firefox)
 * Bitcoin Ticker - monitoring price (Chrome)
 * Biticker - Bitcoin ticker, currency converter and history price graph (Chrome)
 * Bitcoin Microformats Show bitcoin address metadata embedded in a page (Chrome)
 * Bitcoin Address Lookup Right click an address to view its value. (Chrome)

PC apps

 * Qt Bitcoin Trader - Open Source Multi exchange trading client for Windows, Mac OS X and Linux
 * MyBTC-Trader.com - a MtGox Bitcoin trading client for windows with GUI
 * Mining Explorer - monitoring tool for bitcoin mining
 * Bitcoin SMS Alert - sends SMS text alerts to a user's phone based on BTC price / percent thresholds.
 * BTConvert - currency conversion
 * Sierra Chart MtGox Bridge - real-time charting
 * BitTicker - monitoring price (Mac OS X)
 * ToyTrader - a command line trading tool for MtGox
 * goxsh - a command-line frontend to the Mt. Gox Bitcoin Exchange (Python)
 * MyBitcoins gadget - monitoring pool earnings / price (Windows gadget)
 * Bitcoin QR Popup - streamlined interface to bitcoin for POS systems (Windows)
 * Bitcoin Rate - Desktop widget with BTC exchange rate (KDE)
 * Bitcoin Monitor - Desktop widget to monitor status of your Bitcoin miners on mining pools (KDE)

iPhone / iPad

 * Blockchain - Fully featured iphone bitcoin app.
 * Bitcoin Ticker (iPhone) - monitoring price w/push notifications
 * BitCoins Mobile - First iPad native app! Live market data, news feeds, mining pool statistics, full screen exchange price charts, bitcoin network statistical charts. (iPad only, iPhone/iPod Touch coming soon!)
 * BitcoinTrader - Spend/receive BTC via QR codes, trade, deposit/withdraw, etc. Supports Mt. Gox, TradeHill, ExchB, CampBX, and InstaWallet.
 * Bit-pay - Mobile Checkout, set prices in any currency and receive mobile-to-mobile payment
 * Coinbase iPhone App
 * Easywallet.org - Web based wallet, works with QR Code scanner on iPhone/iPad/iPod touch
 * BTC Miner (iPhone) - monitor mining results from various mining pools on iPhone/iPad/iPod touch
 * BitStore - Simple and secure native iOS wallet
 * BitTick - Real-time Bitcoin ticker. Real-time currency convert(support 50+ currency. USD, GBP, EUR, CNY, JPY, CAD, RUB, AUD, BRL, NZD, PLN, KRW…)

Android

 * Direct link to Android Market bitcoin apps. https://play.google.com/store/search?q=bitcoin
 * BitCare - Track bitcoin wallet balance, trade on Mt.Gox, monitor mining pool hashrate, balance, worker status.
 * Bitcoin Alert - monitoring price (Android)
 * Bitcoin-android - Does not appear to be being maitained anymore. https://market.android.com/details?id=com.bitcoinandroid
 * Bitcoin Wallet Balance - view your balance in real time on your android phone
 * Bitcoin Wallet - This is the most functional Android bitcoin wallet application. https://market.android.com/details?id=de.schildbach.wallet
 * BitcoinSpinner - Single address, easy to use, lightweight and open source client. Keys stored on device.
 * BitcoinX - monitoring price (Android)
 * BitPay - https://market.android.com/details?id=com.bitcoin.bitpay (Is not related to the bit-pay.com online payment processor.)
 * Bridgewalker - euro-denominated wallet for the Bitcoin economy
 * Blockchain - Lightweight Android Bitcoin Client - Also works with blockchain.info web interface and iphone app.
 * Coinbase Wallet - supports buying, selling, sending, requesting, and more.
 * Coinbase Merchant - makes it easy to accept bitcoin at a retail location
 * CoinCliff - Monitors price and fires alarms to wake you up, or notifications, as in text messages (Android)
 * Easywallet.org - Web based wallet, works with QR Code scanner on Android devices
 * Miner Status - monitoring miner status (Android)
 * SMS Bitcoins - transactions by SMS

Windows Phone 7

 * Direct link to Windows Phone Marketplace Bitcoin apps:

Windows Phone 8

 * Bitcoin Can - Monitoring prices, account balances and mobile trading on multiple exchanges including Coinbase, BTC-E, CampBX, and MtGox. http://www.windowsphone.com/en-us/store/app/bitcoin-can/57fcf4d6-497a-4663-8da3-93cb26c83b11

see also Bitcoin Payment Apps

Operating systems

 * MinePeon - Bitcoin mining on the Raspberry PI
 * BAMT - a minimal Linux based OS intended for headless mining. Initially announced here  (not maintained)
 * LinuxCoin - a lightweight Debian-based OS, with the Bitcoin client and GPU mining software (not maintained)

Mining apps
Main page: Mining software


 * BFGMiner - Modular ASIC/FPGA/GPU miner in C
 * Bitcoin Miner by GroupFabric - Free easy-to-use DirectX GPU miner on the Windows Store
 * CGMiner - ASIC/FPGA/GPU miner in C
 * MacMiner - A native Mac OS X Bitcoin miner based on cgminer, bfgminer, cpuminer and poclbm
 * Asteroid - Mac-specific GUI based on cgminer
 * MultiMiner - GUI based on cgminer/bfgminer for Windows, OS X and Linux, allows switching between currencies based on profitability

Unmaintained

 * 50Miner - A GUI frontend for Windows(Poclbm, Phoenix, DiabloMiner, cgminer)
 * BTCMiner - Bitcoin Miner for ZTEX FPGA Boards
 * Bit Moose - Run Miners as a Windows Service.
 * Poclbm - Python/OpenCL GPU miner (GUI(Windows & MacOS X))
 * Poclbm-mod - more efficient version of Poclbm (GUI)
 * DiabloMiner - Java/OpenCL GPU miner (MAC OS X GUI)
 * RPC Miner - remote RPC miner (MAC OS X GUI)
 * Phoenix miner - miner
 * Cpu Miner - miner
 * Ufasoft miner - miner
 * Pyminer - Python miner
 * Open Source FPGA Bitcoin Miner - a miner that makes use of an FPGA Board
 * Flash Player Bitcoin Miner - A proof of concept Adobe Flash Player miner

Mining Pool Servers (backend)
Main page: Poolservers


 * CoiniumServ - High performance C# Mono/.Net poolserver.
 * ecoinpool - Erlang poolserver (not maintained)
 * Eloipool - Fast Python3 poolserver
 * Pushpoold - Old mining poolserver in C (not maintained)
 * Poold - Old Python mining poolserver (not maintained)
 * PoolServerJ - Java mining poolserver (not maintained)
 * Remote miner - mining pool software

C / C++

 * libbase58 - C library implementation of Base58 and Base58Check encodings
 * libblkmaker - C library implementation of getblocktemplate decentralized mining protocol

C++

 * libbitcoin

Java

 * BCCAPI (Bitcoin Client API) - a java library designed for making secure light-weight bitcoin clients.
 * BitcoinCrypto - a lightweight Bitcoin crypto library for Java/Android
 * BitCoinJ - Java client library, early development stage but used in live projects already

Perl

 * Finance::MtGox - a Perl module which interfaces with the Mt. Gox API

Python

 * python-blkmaker - Python module implementation of getblocktemplate decentralized mining protocol

Development utilities

 * Bitcoin Dissector - a wireshark dissector for the bitcoin protocol
 * Bitcointools - a set of Python tools accessing the transaction database and the wallet

Lists of software

 * BitGit - list of Bitcoin-related opensource projects hosted at Git

Developer resources

 * Category:Developer
 * Category:Technical
 * Original Bitcoin client/API calls list
 * API reference (JSON-RPC)
 * PHP Developer Introduction

Other

 * Bitcoin Consultancy - an organization providing open source software and Bitcoin-related consulting
 * Open Transactions - a financial crypto and digital cash software library, complementary to Bitcoin
 * Moneychanger - Java-based GUI for Open Transactions
 * BTCnames - a webbased aliasing service which allows to handle unlimited names for your BTC deposit hashes
 * Devcoin - the open source developer coin
 * KIR HYIP Script - ICO, Bitcoin Exchange, Mining and Wallet script development
 * Icoclone - ICO and STO software provider and token development.

Bitcoin Trade Data

 * Bitcoin Charts – Prices, volume, and extensive charting on virtually all Bitcoin markets.
 * MtGox Live - An innovative chart showing a live feed of MtGox trades and market depth. (Must Use Chrome)
 * BTCCharts - An innovative chart showing a live feed of multiple markets, currencies and timeframes.
 * MY-BTC.INFO - A free profit/loss portfolio manager for Bitcoins and other digital currencies including many charts.
 * BitcoinExchangeRate.org - Bitcoin and USD converter with convenient URL scheme and Auto-updating Portfolio Spreadsheet.
 * Bitcoin Sentiment Index - A financial index that collects and disseminates sentiment data about bitcoin.
 * Preev - Bitcoin converter with live exchange rates.
 * Skami - Bitcoin Market Exchange comparison charts.
 * BitcoinSentiment - Crowdvoting site offering means of voting and viewing voters sentiment towards bitcoin.
 * TradingView – network where traders exchange ideas about Bitcoin using advanced free online charts

Web interfaces for merchants

 * BitMerch - Embeddable HTML buttons, instant sign-up, instant payouts, automatic price adjustment for other currencies. No programming skills required to set up.
 * Bitcoin Evolution - Non wallet-based Buy Now button to insert into websites (handles sales tracking; client must be used for actual transaction)
 * BitPay - Buy Now buttons, Checkout posts/callbacks, Mobile Checkout, JSON API
 * Btceconomy - a JavaScript widget listing items for sale
 * BTCMerch - Payment processor for bitcoins and other cryptocurrencies. 0.5% transaction fee. Sandbox is available.
 * Coinbase - Provides bitcoin payment processing for Overstock.com, Reddit, Khan Academy, OkCupid, and more.
 * GoCoin - Payment gateway for bitcoin. Supports JavaScript, PHP, Java, Ruby, and .NET
 * Javascript Bitcoin Converter - currency conversion
 * WalletBit - Easy JavaScript Buy Now buttons, Instant Payment Notification, Application Programming Interface (JSON API), Mobile Checkout, QR-Code
 * PikaPay (info) Buy Now buttons, Twitter Integration, JSON API