Is there any product that can act as a knowledge base for topics (materials will include archived versions of websites, documents, media)?

My apologies for the long title.

I'm looking for something to organise the materials I collect on various topics. As mentioned, these usually include archived webpages, documents/manuals, media (pictures, videos, audio) etc.

I know I could just create a directory system for this (and will likely do so if I can't find anything like what I describe), but just wanted to ask if anything like what I want exists.

Thanks!