How do PMBOK and PRINCE2 differ?
The PMBOK Guide focuses on the role of the project manager, offers methods, tools and areas of knowledge to increase the success of projects, and uses professional and advanced technologies. PRINCE2, on the other hand, is process-based, defining how, when and who does what in a project, defining the roles of everyone involved and using simpler terminology and concepts.
Other project management methodologies worth mentioning: the International Project Management Association (IPMA) - founded in Switzerland as the first project management association in the world and focused on building project management competencies; PM Squared - an open project management methodology developed by the European Commission, recently launched and available for free.