Flexible and powerful data analysis / manipulation library for Python, providing labeled data structures similar to R data.frame objects, statistical functions, and much more
Scipy library main repository
IPython widgets for the Jupyter Notebook
Numpy main repository
Open-Source Subscription Billing & Payment Platform
Portfolio and risk analytics in Python
Zipline, a Pythonic Algorithmic Trading Library
Common financial risk and performance metrics. Used by zipline and pyfolio.
Open source analytics and market risk library from OpenGamma
A community based Python library for quantitative economics
Python Algorithmic Trading Library
The QuantLib C++ library
A framework agnostic, multi-gateway payment processing library for PHP 5.3+
QuickFIX C++ Fix Engine Library
The most popular Ethereum development framework
Easy to use Python API wrapper to plot charts with matplotlib, plotly, bokeh and more
Python library to download market data via Bloomberg, Quandl, Yahoo etc.
Bloomberg Open API module for node.js
Fetch stock quote data from Yahoo Finance
High Performance Inter-Thread Messaging Library
SImple, common-sense Bitcoin-themed Python ECC library
Basic Development Environment - a set of foundational C++ libraries used at Bloomberg.
Python library for backtesting trading strategies & analyzing financial markets (formerly pythalesians)