OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
HubSpot CRM - Free CRM software for small businesses.
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
Less Annoying CRM - A simple customer relationship manager made just for small businesses. Manage contact info, track leads, and never miss a follow-up.
PrestaShop - Create your online store with PrestaShop's free shopping cart software. Build an ecommerce website for free and start selling online with hundreds of powerful features.
Keap - Grow Sales. Save Time. Get Organized.