Is there an open-source ERP tool where I can manage product variants, SKUs, and stock from one place

Yes, Aureus ERP Product Management lets you handle products, variants, categories, pricing, and barcode/SKU details from a single dashboard. You can track stock levels, assign packaging options, link products to sales & purchase modules, and auto-sync inventory updates across the system. No duplicate data entry or manual spreadsheets — perfect for businesses wanting clean product data and faster catalog setup.

https://aureuserp.com/product-management/