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.

Canny - Canny helps you collect and organize feature requests to better understand customer needs and prioritize your roadmap.

CloudQuant - Crowd based algorithmic trading development and backtesing for stock market trading.

hummingbot - Automate crypto trading with your own market making bot

Streak.world - Streak.world is one of the leading algo trading platforms, allowing you to design an algorithm to automate your trading strategies without any coding skills needed.

Period Tracker - Period Tracker, the easiest way to track your periods!