if you want a web based e-mail script I would reccoment neomail
http://neomail.sourceforge.net/
now on a script for a free host what exactly will it need to do? if you want one that maintains the user directories and such I would go with genesis
http://www.xav.com/scripts/genesis/
and if you want a script that would help webmasters on your free site create galleries then you have to wait till I am done writing it : )
if you need other help finding script try here
http://cgi.resourceindex.com/Programs_and_Scripts/Perl/
or you can e-mail me
[email protected]
Nbritt