FusionInvoice - Self hosted invoicing for freelancers and small businesses
Zoho Inventory - Zoho Inventory is an online inventory management software ideal for small businesses. Simplify your inventory and order operations. Try for FREE!
Invoice Ninja - Invoice Ninja is a free, open-source solution for invoicing and billing customers.
Fishbowl Inventory - Fishbowl offers manufacturing and warehouse management solutions for QuickBooks.
Zervant - Easy invoicing, expense management, reporting, and customer feedback.
SellerCloud - SellerCloud is a multi-channel inventory and order management system.