Microsoft CRM

Microsoft Dynamics CRM is a customer relationship management (CRM) solution that provides the tools and capabilities needed to create and easily maintain a clear picture of customers, from first contact through to purchase and post-sales.

With modules for sales, marketing, and customer service, Microsoft Dynamics CRM delivers a fast, flexible, and affordable solution that drives consistent, measurable improvements in every business process, enabling closer relationships with customers and helping to achieve new levels of profitability.

More...  http://www.microsoft.com/dynamics/crm/default.mspx