doi2bib package
This package allows one to convert an id of a document to a BiBTeX record. Currenty the follwoing ids are supported:
- DOI via dx.doi.org
- arXiv.org via its API
- ISBN via http://manas.tungare.name/software/isbn-to-bibtex/
To use, type (or paste) an id into an editor window, select it and press the default keymap: ctrl-alt-shift-d. The id will be changed with a BiBTeX record shortly.