From the comment section:
Mark and find your favorite things and locations in org easily: Create
and update a lookup table of your references and links. Often used
entries bubble to the top and entering some keywords displays only the
matching entries. That way the right entry one can be picked easily.
References are essentially small numbers (e.g. "R237" or "-455-"),
which are created by this package; they are well suited to be used
outside of org. Links are just normal org-mode links.
Bastien Guerry