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.

Pandas - Pandas is an open source library providing high-performance, easy-to-use data structures and data analysis tools for the Python.

quantra - A public API for quantitative finance made with Quantlib

NumPy - NumPy is the fundamental package for scientific computing with Python

Backtrader - Backtrader is a complete and advanced python framework that is used for backtesting and trading.

xlwings - xlwings is a Python library that makes it easy to call Python from Excel and vice versa