Hi all, here is what I am looking for, I use a number of software packages when creating online learning courses. I have a huge number of courses and they use text, audio files, images and video files. I am looking for somthing that I can install on our server and upload the content, index, tag and categorise and enter a description so that when a screen print has to be changed for example I can find all the places that I used the image so that I can go in and change the image without having to check every file that I have created over the last year. An open source solution would be great or something that isn't to expensive.

Thank you for any suggestions you can make.