Ad OpenERP.

OpenERP is a complete ERP and CRM. The main features are accounting
(analytic and financial), stock management, sales and purchases
management, tasks automation, marketing campaigns, help desk, POS, etc.
Technical features include a distributed server, flexible workflows, an
object database, a dynamic GUI, customizable reports, and XML-RPC
interfaces.

WWW: http://www.openerp.com/

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