Does anyone have any suggestions for a good software program for managing large numbers of articles, books, chapters of books, websites, etc.?  As we all know, in our research, we accumulate hundreds of references.  These now include websites, pdf documents, and other multimedia forms of publication.  I'm looking for a Windows-style software that is easy to tab through the fields, allows for all types of media to be entered, makes great use of keywords that "I" enter, and hopefully is even shareware (although a good program is worth purchasing).  I do not like Microsoft Access's bibliography template as it is not robust enough for my needs.  If this is of interest to anyone else, please post your suggestions to the list; otherwise please simply reply to me.  Thank you for your time.
Tom Bodkin
Dept. of Sociology, Anthropology, and Geography