Allomani - Allomani is an E-Store with the shopping cart for online shopping websites, hosting & designing, Paid services, etc.
AffiliateWP - A powerful affiliate marketing solution for WordPress.
OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
ReferralMagic - Turn your users and customers into referral magnets.
Selz - Seriously Simple Selling
Everflow - Partner Marketing Platform - Track, Analyze & Automate