The directories in this location contain packages for
Intel-based systems running

Solaris 2.5 (Solaris 2.5.1, SunOS 5.5, SunOS 5.5.1)
  The Solaris 2.5 files were not done at sunfreeware.com.
  See details on http://sunfreeware.com.
Solaris 2.6 (SunOS 5.6)
Solaris 7   (SunOS 5.7)
Solaris 8   (SunOS 5.8)
Solaris 9   (SunOS 5.9)
Solaris 10  (SunOS 5.10)

These are gzipped pkgadd files (except for the gzip
packages).