Retail Inventory Management System

Hello all.

I began my own Internet business soon and I need to know if there is software that can auto-update the inventory on my future website. Basically, I ask if there is an RMS (Retail Management System) which has an inventory of the updates / sales / customer contacts, etc. If such a software database exists, please let me how and where. Major kudos to the best answer, thank you very much for reading this! :-)

What cart or E-commerce software that you plan to use for Internet sales? Magento, OSCommerce ZenCart and are the main. They are all open source and can be downloaded free. There are add-on modules available inventory - you may have to pay for it. They also incorporate open source software, free CRM for sales / customer contact.