Reference Management

The best soft I know is JabRef. which does the same job as Endnote
(predefined bibliographic style, citation import, file linking, DB advanced search functions, ...)
but is written in Java (so can be used on any system (Windows, Linux, Mac)), is open source and free!

Latex users can carry on using bibtex, whereas

• Microsoft Word users should have a look here and
• Open Office users, should install the following plugin.

PS: To find an article from its DOI, go there http://dx.doi.org
or type http://dx.doi.org/XXX in a web browser where XXX is the DOI you're looking for.