Referencer for Linux is a Gnome application to organize documents or references, and ultimately generate a BibTeX bibliography file. Referencer uses documents' metadata to provide handy links to the document's web location. Referencer will import your existing bibliography files using the BibUtils library. With Referencer you can use tags to categorise your documents. If you show Referencer a PDF which has an arXiv ID or DOI code, Referencer will retrieve the metadata for this document over the internet. Referencer can be extended using the versatile Python scripting language. Referencer is translated into many languages.