You could do worse than try
GetRight -
http://getright.com/ (from Headlight Software -
http://headlightinc.com/).
I think it might have been a forerunner or led the way for meeting all/most downloading requirements, including batch downloading from a text list, passing logon credentials, etc. It works with major browsers too.
GetRight also includes the incredibly useful
GetRight Browser, which enables the user to browse/view the directories of accessible download sites.
Some people (not me, you understand) might say that, with a bit of experimentation, it is surprising how much stuff one can find to download with GetRight that might not be apparently available to the casual/inexpert enquirer, by back-dooring weak/nonexistent access control and apparently locked directories ...
- however, I couldn't possibly comment.