> The weakness for this free or share soft is that there are
> little documents for them in chinese.
Well, in the case of Maxima, we certainly need to improve the
documentation in English, too :-( !!!
More seriously, much of the documentation of free systems is also free,
and can be *legally* translated into other languages by individuals or
groups of individuals.
I imagine that there are courses at your university in "English for
engineering/science students" or in "technical translation of English".
Couldn't they be organized to systematically translate existing free
documentation? This would be excellent training for the students (with
supervision), and it would produce a valuable result.
-s