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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Vtiger CRM

https://www.vtiger.com/open-source-crm/ The open source edition is supported by a vibrant community of thousands of businesses, hundreds of thousands of users, and countless developers and partners that help shape its direction. That means that while its core functionality far surpasses that of alternatives, and it can be easily extended through the hundreds of plugins developed by professional Vtiger developers, and available on the extension marketplace. With all that, it’s no wonder that V...
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X2CRM

https://www.x2crm.com/ X2CRM is an open source CRM software platform for marketing, sales, customer service and other custom applications powered by an easy to use workflow engine and process management framework. Manage your clients with an endlessly customizable, powerful app, and boost your productivity like never before.  The power and flexibility of X2CRM comes from its design. At the heart of X2CRM lies two software components: the first a visual Workflow Automation engine, called X2Flo...
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