It's been repeatedly stated on this particular forum that Open Office is accessible via JAWS.  I can't say how "fully" qualifies as "fully" to any given user, but there are lots of folks here who are using Open Office as their suite of choice.

Brian
-- 
I have yet to see any problem, however complicated, which, when looked at in the right way, did not become still more complicated.
     ~  Poul Anderson