or typesetting critical editions in the traditional manner with LaTeX, we [i.e.: see bottom] know of two macro packages:

* ednotes.sty by Christian Tapp and Uwe Lück;
* ledmac by Peter R. Wilson.

When both packages were devised, critical edition typesetting with TeX required the EDMAC macros by Dominik Wujastyk and John Lavagnino. EDMAC, however, is not compatible with LaTeX, which many prefer to Plain TeX. So ledmac was written as (almost) a port of EDMAC to LaTeX (while its functionality has increased much since). ednotes was written as an attempt at a somewhat smarter user interface than that of EDMAC.