Changelly’s trading algorithm is integrated into the largest cryptocurrency exchange platforms, including Binance, Poloniex, Bittrex, etc. In the span of milliseconds, Changelly makes bids and asks on the platforms, then selects and suggests the best available rate and displays the estimated rate on our site. The rates remain approximate until the transaction is actually made on the blockchain, which is why the exchange rate at the time of a transaction may differ slightly from the estimated rate that you see when you begin a transaction.

State of the DApps is a not-for-profit curated directory of Decentralized Applications, also called DApps, which run on various several blockchains. State of the DApps was initially created to categorize and showcase developed projects built on the Ethereum Blockchain, but more recently we have added support for EOS, POA and Steem as well.

Blockchair is a blockchain search and analytics engine for Bitcoin, Ethereum, Bitcoin Cash, Litecoin, Bitcoin SV, Dash, Ripple, Dogecoin and Groestlcoin or you can also say it's an engine that consists of blockchain explorers on steroids. You can filter and sort blocks, transactions, and their content by a variety of different criteria, as well as perform full-text search over the blockchains.

Tokenview is the first multi-cryptocurrency query blockchain explorer [...]. Tokenview allows you to search wallet address, transaction, latest block, block height, and other information of tens of thousands types of mainstream cryptocurrencies like BTC, ETH, ERC20 Tokens, BCH, ETC, LEC, ZCASH, DASH, DOGE, etc.

Freqtrade is a cryptocurrency trading bot written in Python. [...]

Features

Based on Python 3.6+: For botting on any operating system — Windows, macOS and Linux.
Persistence: Persistence is achieved through sqlite database.
Dry-run mode: Run the bot without playing money.
Backtesting: Run a simulation of your buy/sell strategy with historical data.
Strategy Optimization by machine learning: Use machine learning to optimize your buy/sell strategy parameters with real exchange data.
Edge position sizing: Calculate your win rate, risk reward ratio, the best stoploss and adjust your position size before taking a position for each specific market.
Whitelist crypto-currencies: Select which crypto-currency you want to trade or use dynamic whitelists based on market (pair) trade volume.
Blacklist crypto-currencies: Select which crypto-currency you want to avoid.
Manageable via Telegram or REST APi: Manage the bot with Telegram or via the builtin REST API.
Display profit/loss in fiat: Display your profit/loss in any of 33 fiat currencies supported.
Daily summary of profit/loss: Receive the daily summary of your profit/loss.
Performance status report: Receive the performance status of your current trades.

Hummingbot is an open-source project that integrates cryptocurrency trading on both centralized exchanges and decentralized protocols. It allows users to run a client that executes customized, automated trading strategies for cryptocurrencies.

We created hummingbot to promote decentralized market-making: enabling members of the community to contribute to the liquidity and trading efficiency in cryptocurrency markets.

Shrimpy is a free crypto exchange trading bot for portfolio management, indexing the market, rebalancing, and strategy backtesting.

Unified RESTFUL APIs

Use the same API for the 133 exchanges - same API, same parameters, same output formats! And notice the info field? - yep, that's the raw output response from the exchange itself! So you get a common response output across the different exchanges, and you get the raw exchange-specific output from each exchange as well!

Send, receive & exchange cryptocurrency with ease on the world's leading Desktop, Mobile and Hardware wallets.

Securing Bitcoin payments since 2011.
Electrum is one of the most popular Bitcoin wallets.

Electrum is fast, secure and easy to use.
It suits the needs of a wide spectrum of users.