Document Archive (docarc) is a database written in Perl to help you (and your workgroup) keeping track of the vast amount of electronic documents and BibTeX entries you might have in use. The underlying database is MySQL (because it's addressed through Perl's DBI, it might work with others as well).
It's meant to be an alternative to .bib files and a complicated directory structure of document files. Although it's a web-based software command line frontends to the most important features have been developed. Some work on integration into the outstanding browser suites Mozilla and Firefox has also been done.
DocArc Features:
* widely configurable
* charset recode (bibtex, html, rdf)
* tree structure for content classification
* multiuser containers may be used to group project oriented documents
* public runmode allows readonly access to allowed documents for anyone without authorization
* fully themeable
* traditional (standard) theme
* simple layout that returns special pages for your internal search engine (eg. htdig)
* dynamic online help
* fields/doctypes structures and categories configurable via web interface
* command line interface (cli) for simple access during latex document compiling
* internal database search lets you specify complex search expressions
* fulltext search through document files available via integrated ht://dig support
* modular extensible.
* mozilla/firefox integration (plugin and search engine)
Available extensions:
* frame and iframe based extensions of the traditional theme
* planned: scan2pdf interface (tiff/bmp/png/jpeg -> pdf)
* planned: content extraction (just have to upload a pdf file, database extracts the necessary content)
* planned: printing and format conversion abilities (ghostscript, xpdf, lpr, psutils)
* planned: email support (send registered users bibtex entries or document files)
* planned: documentation of template interface
* planned: little integration into some famous editors (eg. vi, emacs, kile)
* planned: more browser integration (eg. internet explorer, opera, konqueror)
Mozilla/firefox integration:
* direct access to documents via toolbar
* select html embedded bibtex and post it directly to docarc via context menu
* let docarc parse the currently viewed web-page (many famous e-journals are supported)
* query document archive from sidebar or url input field

The license of this software is Freeware, you can free download and free use this file management software.