OpenCart - A free shopping cart system. OpenCart is an open source PHP-based online e-commerce solution.s
Clever - syncing between education applications for K-12 schools
WooCommerce - A freely available eCommerce plugin that enables shop facilities on your WordPress website. Functionality enabling extensions & beautiful themes available.
PowerSchool - PowerSchool provides a K-12 education technology platform for operations, classroom, student growth, and family engagement.
WCFM Marketplace - WCFM Marketplace is a plugin made for WordPress that provides features for a multi-vendor marketplace platform.
Claroline - Claroline is a collaborative eLearning and eWorking platform.