QuantConnect - QuantConnect provides a free algorithm backtesting tool and financial data so engineers can design algorithmic trading strategies. We are democratizing algorithm trading technology to empower investors.
TradingView - The best charting tool for crypto and stocks
Quantopian - Your algorithmic investing platform
TradingLite - Next-generation technical analysis platform Real-time liquidity heatmap, order-flow tools, indicator scripting plus more, whilst supporting all major crypto exchanges.
CloudQuant - Crowd based algorithmic trading development and backtesing for stock market trading.
ProRealTime - Online trading, charting and technical analysis of stocks, futures, forex and commodities.