Quantopian!

Algoriz users proprietary Artificial Intelligence to help you put your trading expertise to full use in creating market-beating algorithms.

Quantreex is a web based trading platform that let you create automated trading strategies in less than a minute. You can backtest, optimize and execute orders with multiple brokers. No coding is required.

Your trading strategies are your proprietary way to trade. You have extraordinary ideas that can be developed into a profitable trading strategy.

quantra is a public API for quantitative finance made with Quantlib. The API is well documented and includes accessible details for use with Google Sheets.