Stockpile - Stockpile is a free online inventory system for small business and at home uses.
ERPNext - The ERP Software that helps you take full control of your business. ERPNext is both powerful and easy to use.
inFlow Inventory - inFlow Inventory is inventory management software for small businesses.
OpenPapyrus - The enterprise management system OpenPapyrus
Fishbowl Inventory - Fishbowl offers manufacturing and warehouse management solutions for QuickBooks.
Odoo - An all-integrated business app suite to unleash your growth potential.