The Project Management Institute (PMI) is responsible for publishing the well-known Project Management Professional (PMP) certification. If you would like more information about PMI or the PMP, visit http://www.pmi.org.
The Software Engineering Institute (SEI) and its Capability Maturity Model Integration (CMMI) are useful tools for gathering best practices for software-development methodology. The SEI's mission is to advance software engineering and related disciplines to ensure the development and operation of systems with predictable and improved cost, schedule, and quality. The CMMI is a process-improvement approach that provides organizations with the essential elements of effective processes. If you would like more information on them, visit http://www.sei.cmu.edu.