Zotero is a free Firefox extension that allows you to collect, manage, cite, & share research sources.
It's free, open source, and extensible.
Integrated in the web browser so there is no software to install.
Create groups to collaborate with colleagues.
To use Zotero with Mircosoft Word and OpenOffice you will need to first install the word processor plugin for the application you are using.
Start building your library - There are several ways to add to your citation database including importing items that Zotero automatically finds on web pages, conversion from other bibliographic software such as Endnote or Reference Manager, retrieval of items based on unique identifier, and the manual creation of records. Click on the link to learn more about building your reference library.
Organize your library - Use folders and tags to organize your library by project or topic.
Searching your library - Search on metadata, tags, or content to find items in your collection. Advanced search allows you to save search that automatically update when new items are added. Zotero also support full text indexing of pdf's.
Create a bibliography - Automatically create bibliographies from cited items within the word processor. Or create bibliographies manually and import them into your document.
Citing items - Insert citations, footnotes, and endnotes directly from the word processing software. Include multiple sources for the same citation. Quickly change the citation style for the whole document.
Converting from other bibliographic software - Easily import or export you existing bibliographic items between Zotero and EndNote or Reference Manager.
Collaborate- Share your citations lists with colleagues by creating a group. Groups have their own web page and members can add, edit, and delete items. Groups can be set to public or private.