Suggestions for samples

The following packages have something in common with the package samples. The packages are ordered in decreasing similarity.

Package extradefs: A miscellany of support macros
Package firstline: Print the first line of a paragraph in a different font
Package toc: Table of contents macros for Plain TeX
Package bibtex-test: BibTeX testing files
Package bibtex-examples: Examples of BibTeX usage
Package basix: A BASIC interpreter written in TeX
Package dtxgallery: A small collection of minimal DTX examples
Package metapost-examples: Example drawings using METAPOST
Package code: Typeset code in verbatim
Package mathtrip: A trip to the wonderful world of mathematics
Package examplep: Verbatim phrases and listings in LaTeX
Package latexdemo: Demonstrate LaTeX code with its resulting output
Package sverb: A set of verbatim text manipulations
Package download: Allow LaTeX to download files using an external process
Package bashful: Invoke bash commands from within LaTeX
Package context-filter: Run external programs on the contents of a start-stop environment
Package showexpl: Typesetting LaTeX source code
Package tkzexample: Package for the documentation of all tkz-* packages
Package tkz-doc: Documentation macros for the TKZ series of packages
Package ydoc: Macros for documentation of LaTeX classes and packages
Package fancyvrb: Sophisticated verbatim text
Package cnltx: LaTeX tools and documenting facilities
Package jupynotex: Include whole or partial Jupyter notebooks in LaTeX documents
Package context-vim: Generate ConTeXt syntax highlighting code from vim
Package graphicscache: Cache includegraphics calls
Package minted-code: Predefined environments for typesetting LaTeX code with minted
Package hvextern: Write and execute external code, and insert the output
Package harvmac: Macros for scientific articles
Package resumemac: Plain TeX macros for resumés
Package letter1: Letter formatting macros
Package mlawriter: Write MLA style documents in Plain TeX