Dolibarr

https://www.dolibarr.org/ Dolibarr ERP & CRM is an opensource and free software package to manage companies, freelancers or foundations. We can say Dolibarr is an ERP or CRM (or both depending on activated modules). It's an OpenSource project built by the addition of modules (you only enable the features you need), on a WAMP, MAMP or LAMP server (Apache, Mysql, PHP for all Operating Systems). Dolibarr was developed to try to offer an ERP and CRM software whose main goal is to be simple...
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Opentaps

http://www.opentaps.org/about-opentaps opentaps Open Source ERP + CRM is a fully integrated application suite that brings together top-tier open source projects to help you manage your business more effectively. Today, opentaps supports ecommerce, Customer Relationship Management, Warehouse and Inventory Management, Supply Chain Management, and Financial Management to Business Intelligence and mobility integration out-of-the-box. http://www.opentaps.org/about-opentaps
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