Sugar Community Edition
Sugar consists of modules, each of which represents a specific functional aspect of CRM such as Accounts, Activities, Leads, and Opportunities. For example, the Accounts module enables you to create and manage customer accounts, and the Activities module enables you to create and manage activities related to accounts, opportunities, etc. These modules are designed to help you manage customer accounts through each step of their life cycle, starting with generating and qualifying leads to customer support and resolving reported bugs. Because many of these steps are interrelated, each module displays related information. For example, when you view the details of a particular account, the system also displays the related contacts, activities, opportunities, and bugs. You can view, edit, and create this information.
Website http://www.sugarforge.org/content/open-source/
vTiger
vtiger CRM is a free, fully-featured open source CRM solution with low-cost, reliable product support ideal for small and medium businesses. vtiger CRM is a widely used product with thousands of users in dozens of countries. It has a vibrant community of users driving the product forward, and contributing to it’s development. Over 2 million copies of vtiger CRM have been downloaded to date.
Website https://www.vtiger.com/crm/open-source/
openCRX
openCRX is an open CRM solution that meets the needs of organizations requiring multifunctional, enterprise-wide coordination of sales generation, sales fulfillment, marketing and service activities to customers, partners, suppliers or intermediaries.
Website http://www.opencrx.org/
EPESI
EPESI is a web application for managing business information. It makes data organizing and sharing easy, simplifies internal communication and makes workflow more efficient.
EPESI has a modular design which makes it flexible and easy to adapt. Its base consists of CRM application with PHP framework, both free and open source, that can be extended with specialized modules.
Website http://epe.si/
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.
Website http://www.opentaps.org/
CiviCRM
CiviCRM is a free, libre and open source constituent relationship management solution. CiviCRM is web-based, internationalized, and designed specifically to meet the needs of advocacy, non-profit and non-governmental groups. CiviCRM is a powerful contact, fundraising and eCRM system that allows you to record and manage information about your various constituents including volunteers, activists, donors, employees, clients, vendors, etc. Track and execute donations, transactions, conversations, events or any type of correspondence with each constituent and store it all in one, easily accessible and manageable source.
Website http://civicrm.org/
SplendidCRM
SplendidCRM is an alternative solution to SugarCRM but it is written in C# for the ASP.NET framework.
The Community Edition includes the core CRM features, such as Accounts, Contacts and Leads, but it excludes advanced features, such as Reporting and Order management. The Community Edition has been released under the GNU Affero General Public License Version 3.
Website http://www.splendidcrm.com/Products/Editions/SplendidCRMCommunity.aspx
Dolibarr
Dolibarr ERP & CRM is a modern and easy to use web software to manage your business (contacts, invoices, orders, products, stocks, agenda, emailings, etc…).
It’s an opensource and free software designed for small companies, foundations and freelances.
You can install and use it as a standalone application, or online on a mutualized or dedicated server to use it from anywhere.
Website http://www.dolibarr.org/
OFBiz
Apache OFBiz (The Apache Open For Business Project) is an open source enterprise automation software project licensed under the Apache License Version 2.0. By open source enterprise automation we mean: Open Source ERP (Enterprise Resource Planning), Open Source CRM (Customer RelationShip Management), Open Source E-Business / E-Commerce, Open Source SCM (Supply Chain Management), Open Source MRP (Manufacturing Resources Planning), Open Source CMMS/EAM (Maintenance Management System/Enterprise Asset Management), Open Source POS (Point Of Sale), and so on.
Website http://ofbiz.apache.org/