This eBay-owned project has won multiple awards and claims to power twice as many Internet Retailer Top 1000 merchants as any other solution. It comes in multiple paid versions, both cloud-based an on-premises, as well as the community edition. Operating System: Windows, Linux, OS X
Claiming to be "stable and highly usable," nopCommerce has been downloaded more than 1.5 million times. Key features include mobile commerce, multi-store capabilities, SEO, and marketing features like a reward points system, discounts and coupons, Facebook export, related products upselling, newsletter subscriptions, product reviews and ratings, product comparison and an affiliate program. Operating System: Windows.
"Feature-rich and user-friendly," OpenCart offers a visually appealing interface, multi-currency and multi-language support, product reviews and ratings, SEO, PCI compliance, sales reports, discounting and more. Commercial support is provided through partners. Operating system: Windows, Linux, OS X
A fork of osCommerce (see below), osCMax boasts features like vouchers and coupons, virtual product support, web-based administration, customer loyalty discounts, SEO-friendly URLs, an article manager and more. Paid documentation is available. Operating System: Windows, Linux
Used by more than 280,000 online stores, osCommerce has been around for 16 years. Services are available through third-party partners. Operating System: Windows, Linux, OS X.
42. OXID eShop
OXID offers B2B and B2C ecommerce, as well as omnichannel solutions. The open source version is called eShop, and it has a large and vibrant user community. Operating System: Windows, Linux, OS X
Boasting more than 250,000 users, PrestaShop is a very popular ecommerce solution with mobile-responsive design, advanced SEO features, in-depth sales statistics, dynamic pricing rules, coupons and vouchers, reviews, loyalty programs and email marketing. Paid cloud and expert versions are available, as well as the free download. Operating System: Windows, Linux, OS X.
For Windows users, SmartStore.NET is a multilingual, SEO-optimized, mobile optimized, customizable and scalable ecommerce solution. The organization offers several levels of paid support. Operating System: Windows
Powering more than 45,000 online retail sites, Spreecommerce offers modular architecture, customization, responsive site design and more. It's won several awards, and extensive documentation can be found on the site. Operating System: OS Independent
46. Tomato Cart
This mobile-friendly project claims to be "the first open source shopping cart solution designed for offering great user experience for all digital devices. Key marketing features include a banner manager, Google Adsense integration, Web analytics, SEO, email system, catalog management, reviews and ratings, wishlists, "tell a friend," discounts, newsletters and more. Operating System: Windows, Linux
Now 15 years old, X-Cart handled more than $2.3 billion in transactions from more than 35,000 stores last year. It's PHP-based, and multiple paid versions are available. Operating System: Windows, Linux, OS X
48. Apache OFBiz
Short for "Open for Business," this Apache ERP solution offers a number of capabilities for marketing teams, including advanced ecommerce, catalog management, promotion and pricing management, CRM, content management, and more. In addition, it also includes traditional ERP functionality like accounting, supply chain management, project management, etc. Operating System: OS Independent
Used by more than 2 million people, Odoo promises to simplify omnichannel sales. It includes tools for website building, blogging, ecommerce, CRM, subscriptions, email marketing, surveys, events, and much more. Operating System: Windows, Linux, OS X
Calling itself the "most advanced open source ERP + CRM solution," Opentaps counts Toyota and Honeywell among its users. It includes tools for tracking the leads to account sales conversion process, campaigns, contact lists, ecommerce, VoIP integration, and more. A paid professional version, a cloud version, and related services are available for purchase. Operating System: Windows, Linux