Fortran
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I have used it for lots of large programs. Presently I am trying to get
Spice 2G.6 running on the Amiga. This compiler is almost as good as the
one I use on a VAX at work. It has a nice debugger too. If you use RAM:
for all the files it will compile faster than 2000 lines per minute. From
the disk (3.5") I get 200 to 300 lines per minute.
I have found several bugs in working with it. The Absoft people are very
easy to work with and have fixed all but one at no charge. Overall I have
no real complaints and considerable praise for the compiler. Its the only
way to go for FORTRAN on the Amiga.