CodeGrape
CodeCanyon
Codester
Theme Forest
99designs
Creative Market
Sell My App
Sell.app
Quantopian
QuantConnect
Backtrader
CloudQuant
QuantRocket
Gekko Plus
Intrinio
Quantreex
CodeGrapeCodeCanyon - Scripts and Snippets From $1 for PHP, JavaScript, ASP.NET, CSS, Plugins, HTML5, Mobile and more
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.
Codester - The marketplace for ready-to-use web development assets
Backtrader - Backtrader is a complete and advanced python framework that is used for backtesting and trading.
Theme Forest - The #1 marketplace for premium website templates, including themes for WordPress, Magento, Drupal, Joomla, and more. Create a website, fast.
CloudQuant - Crowd based algorithmic trading development and backtesing for stock market trading.