Collaborative Project Management Resources
IPMA International Project Management Association
GPM Deutsche Gesellschaft für Projektmanagement e.V.
GPM is the German Association for Project Management and offers valuable resources and knowledge transfer betwen their members. Vistit GPM here.
Project Management definition - Wikipedia
Wikipedia has a clear definition of Projectmanagement at hand, you can find it here: Project Management at Wikipedia
PMI (Project Management Institute)
The Project Management Institute is a world leading project management organization with over 450,000 Global Members and over 280 Local Chapters Internationally. You can find the PMI here: Project Management Institute
Project Management (.com)
ProjectManagement.com PM Infosite is a valuable resource for Project Management techniques and information for practitioners, you can find it here: Project Management (.com)
All about Project Management
At the Free Management Library a valuable resource list of Project Management information is aggregated, you can find it here: Management Help
Harvard Business Review
HBR dedicates a special interest area of the HBR Review to the Project Management space and its impact on business, you can find it here: HBR Review
IAPM (International Association of Project Managers)
The International Association of Project Managers (IAPM) is a globe-spanning association and certification body for project managers. You can find them here: IAPM Association