The Apache Open For Business Project is an enterprise automation software project that includes ERP, CRM, E-Business/E-Commerce, SCM, MRP, and CMMS/EAM functions. It is a foundation and starting point for enterprise solutions and can certainly be used out of the box, but is also great for creating specialized applications.
SkrubCRM is a CRM that can be used easily by companies of all sizes. Larger organizations can rely on it to deliver constantly and reliably. It has comprehensive role based security. It can use any Hibernate supported database. It does not require an application server to run; it can run on a Web server like Tomcat or Jetty. It can support millions of customers easily. It is extremely fast. It complies with ITIL, SOX, and other international regulations. Its internationalization and localization features allow it to be translated into any language easily.