The OD Network 

A community of OD professionals.  There is a homepage, and many of the regional networks also have homepages.

http://www.odnetwork.org

 ASTD OD Community   American Society for Training and Development (ASTD) has a community space set up for Organizational Development people.   

http://www.astd.org/communities/networks/OD_Leadership/odLeadership.htm

The American Management Association (AMA) AMA is the world's leading membership-based management development and training organization. Information and resources are available on all aspects of business management and professional development.

http://www.amanet.org

HR People and Strategy (HRPS) Founded in 1977, the Society is a non-profit organization dedicated to providing current perspectives on complex and challenging human resource and business issues. Formerly known as the Human Resources Planning Society.

http://www.hrps.org

International Personnel Management Association A professional association for public personnel professionals, primarily those who work in federal, state, or local government. IPMA's mission is to provide professional human resource management leadership, education, information, and representation services to advance organizational objectives and quality in the public sector.

http://www.ipma-hr.org

Corporate University Exchange CUX  A thinktank and benchmarking organization in the area of corporate universities

http://www.corpu.com

Society of Human Resource Management (SHRM) A worldwide professional association of human resource professionals with more than 100,000 members worldwide!   Special interest area for Organization and Employee Development:

http://www.shrm.org/hrdisciplines/orgempdev/Pages/default.aspx

WorldatWork Dedicated to knowledge leadership in total rewards disciplines associated with attracting, retaining and motivating employees. Formerly the American Compensation Association.

http://www.worldatwork.org