extradefs – A miscellany of support macros
The macros work equally in LaTeX and Plain TeX; no documentation is available, even as comments in the file.
Maybe you are interested in the following packages as well.
- toc: Table of contents macros for Plain TeX
- declare: Declare register names locally
- unouter: Suppress \outer flags in Plain TeX
- mathtime-pln: Plain TeX macros for using MathTime and MathTime Plus