PDF categories and searching? Is there a plugin?

i am creating a WP information site for a client. we have hundreds of documents in PDF form. and they are currently in folders on our computer, some already in the root of the site. the idea is to have these categorized and searchable on the web. so far the only plugin i have found is ‘Document Links’, which is very basic. i do have a couple indexing programs i had used for the html version of the site, these will index PDFs.