QuantRocket
QuantConnect
Quantopian
Backtrader
CloudQuant
Intrinio
Gekko Plus
Quantreex
SourceForge
GitHub
GitLab
BitBucket
openDesktop.org
Gitea
Launchpad.net
OSOR
QuantRocket
SourceForgeQuantConnect - 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.
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
Quantopian - Your algorithmic investing platform
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Backtrader - Backtrader is a complete and advanced python framework that is used for backtesting and trading.
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.