The Eidetic Document Management System is a powerful open source system
that can be customized to your needs. In particular, it supplys the
following features:
Project-oriented grouping of folders & documents
Keeps old revisions for administrative resurrection
Searching on any combination of metadata criteria
A given document can be 'linked' into multiple folders
Documents 'published' at stable URL's independent of folder structure
Thumbnails automatically generated for PDF's and image files
An easy to use web interface & fast access to any document file
Upload files through web-interface
Edit document and folder properties via web or commandline
Documents can be organized in hierarchical folder tree displays
Search string URL's can be bookmarked
Thumbnail previews of several kinds of documents (extendable via ImageMagick)