hackalloc – Make allocations local
The package makes all allocation (\newcount, \newdimen, etc.) local.
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support for development of (La)TeX macros
Maybe you are interested in the following packages as well.
- unouter: Suppress \outer flags in Plain TeX
- bibmods: Tighter tolerances for bibliographies
- rangecite: Will turn a range of citations into something like [1..3]
- xrefwarn: Only one warning for an undefined citation