Wikipedia
Wikindx
Wikindx is a free bibliographic and quotations/notes management and article authoring system (Virtual Research Environment) designed either for single use (on a variety of operating systems) or multi-user collaborative use across the internet. Wikindx falls within the category of reference management software, but also provides functionality to write notes and entire papers. Developed under the GNU GPL license, the project homepage can be found at sourceforge.net and the required files/updates are available for download there.