The TeX Catalogue OnLine, Entry for endnote, Ctan Edition

Generic "endnotes" code.

A very simple set of macros for producing endnotes (“instead of footnotes”). The endnotes are saved in a box, which is re-emitted by a command \producenotes; this technique does not scale well.

For all its limitations, the package has the distinction of working with most TeX formats (unlike the LaTeX-only endnotes, for example).