MaxxERP is one of the best Financial Accounting, Billing and Inventory management software for small businesses. They have different products -

Maxx POS - Retail POS Billing Software[/list]

Maxx Finacsys - Online Billing, Accounting, Inventory Management Software[/list]

Maxx BIZ - Retail Billing Inventory Accounting Software[/list]

MediMaxx - Pharma Accounting Billing Inventory Software[/list]