While researching about SaaS (Software as a Service, you can also call hosted apps) Applications available for Inventory Management, I came across many of those. I shortlisted few of those. Please have a look.
Ordoro: Web-based order management, purchasing management & inventory management for Amazon, BigCommerce, Shopify, 3DCart & Shopsite e-commerce merchants & more.
Stitch Labs: Stitch is an online software for product-based businesses. Manage inventory and orders from online & offline sales, all in one place.
SalesBinder: SalesBinder is an easy-to-use, online management system which streamlines your Inventory, Customer Accounts, Sales Leads, Purchase Orders, and Billing related tasks for you.
TradeGecko: TradeGecko’s inventory and order management solution offers businesses an easy-to-use solution to manage all their inventory, orders and sales online; order management software, stock management software, sales management, inventory management, invoicing and ordering. Pairs very well with parts storage systems.
Unleashed Software: Online inventory management software for small, medium and large business.
If you know any such good application, please let us know.