LiteratureDB
literaturedb is a bibliographic management software that can help you organize your literature and bibliographic references for scientific documents. It runs as a PHP web site and provides a collaborative space for storing and sharing documents and references.
You can download the current version here: 
literaturedb.zip. The package contains the file installationmanual.html which explains the installation and update procedure.
Features
 Simplicity You will find all options on just four pages. |
 Bibtex It uses Bibtex entry types so you can reuse references. |
 Full text It stores full text files (pdf, doc, etc.) for quick access. |
 Exports Export to Word, Bibtex, Endnote, MODS and RIS. |
 Collaborate Share documents in your team and with friends. |
 Search function Find documents with the search function. |
 Tagging You can tag every document with keywords. |
 Small footprint It is 580px wide so it fits besides a word processor. |
 LDAP Reuse the user management of your organization. |
 Customize Reuse the CSS design of your organization. |
 FLOSS It is free and open source (GPL). |
Technical requirements
For running your own installation of literaturedb you need an ordinary web hosting with the following specifications:
- PHP 5.0 or higher
- MySQL 4.1 or higher
- Enough disc space for storing the document files
- UTF8 has to be enabled in PHP and MySQL for supporting special characters