How widely used is HPF?

There are currently 35 listed HPF applications.

The High Performance Fortran Forum (HPFF), a coalition of industry, academic and laboratory representatives, works to define a set of extensions to Fortran 90 known collectively as High Performance Fortran (HPF). HPF extensions provide access to high-performance architecture features while maintaining portability across platforms.
This site has eight sections:

• Home - basic information about High Performance Fortran and the HPFF; you are currently here
• Versions - specifications on the latest version of HPF, Version 2.0, as well as earlier versions
• Compilers - information on various compilers and tools, as well as a database of implementations available for search
• Projects - includes a listing of ongoing research around the globe, as well as previous endeavours which inspired the current version of Fortran
• Publications - publications about HPF
• Applications - applications using HPF
• Benchmarks - HPF performance results
• Events - upcoming events dealing with HPF
• Contacts - mailing lists, personnel, and other info