Microsoft Dynamics

Microsoft Dynamics consists of five products:

Microsoft Dynamics AX (Axapta)

Designed for midsize and larger companies, Microsoft Dynamics AX (formerly Microsoft Axapta) is a multi-language, multicurrency enterprise resource planning (ERP) solution. With core strengths in manufacturing and e-business, there is an additional strong functionality for the wholesale and services industries.

Microsoft Dynamics CRM

Microsoft Dynamics CRM is a sophisticated business application platform that provides the basic services required by ISVs, VARs, and even business analysts to build upon. A wide range of applications can be created with this platform. These applications may be based on Microsoft Dynamics CRM but are not limited to CRM-type applications.

Microsoft Dynamics GP (Great Plains)

Microsoft Dynamics GP is a business management solution that provides growing and midsize organizations with complete and scalable financial and operational functionality. Several development tools are available that can be used to customize and create integrations for Microsoft Dynamics GP.

Microsoft Dynamics NAV (Navision)

Microsoft Dynamics NAV is a business management solution that helps small and mid-sized organizations streamline their highly specialized business processes, rapidly adapting to the unique way they do business. Through the rapid adaptability, simplified customization, and ease of use offered by Microsoft Dynamics NAV, you can easily add functionality, custom applications, and online business capabilities that enhance the built-in industry-specific functionality that's relevant to the local needs of customers' businesses.

Microsoft Dynamics SL (Solomon)

Microsoft Dynamics SL (formerly Microsoft Solomon) is perfect for the project-driven mid-size organization needing a modularized business management solution for managing people, projects, and profitability. This solution comes in two editions and is ideal for professional services, operations, field services and construction management, and wholesale distribution businesses with multiple locations and divisions.

for more details please refer this link :
http://msdn.microsoft.com/en-us/dynamics/ax/default.aspx