1. FinmarketpyPython library for backtesting trading strategies & analyzing financial markets (formerly pythalesians)
2. TcapyOpen source TCA (transaction cost analysis) Python library for FX spot
3. FindatapyPython library to download market data via Bloomberg, Eikon, Quandl, Yahoo etc.
4. ChartpyEasy to use Python API wrapper to plot charts with matplotlib, plotly, bokeh and more