The source for the C-with-Ease compiler and libraries cease.tar.gz is here. This file contains some instructions on how to build it.
C-with-Ease can be built using many different parallel systems very simply. Currently supported are:
Further ports are fairly easily based on one of these.
PVM is available from netlib and runs on many different architectures.
Posix draft 4 threads are available for the DEC alpha machines.
There is a posix draft 6 threads package available for linux, SunOS, solaris and FreeBSD here.
REX lwp is another threads package for linux and SunOS available here.
uSystem is available from here.