texlive-plain-extra binary package in Ubuntu Xenial amd64

 Add-on packages and macros that work with plain TeX.
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 This package includes the following CTAN packages:
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 epsf-dvipdfmx -- Plain TeX file for using epsf.tex with (x)dvipdfmx.
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 figflow -- Flow text around a figure.
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 fixpdfmag -- Fix magnification in PDFTeX.
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 font-change -- Macros to change text and mathematics fonts in plain TeX
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 fontch -- Changing fonts, sizes and encodings in Plain TeX.
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 getoptk -- Define macros with sophisticated options.
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 gfnotation -- Typeset Gottlob Frege's notation in plain TeX
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 graphics-pln -- LaTeX-style graphics for Plain TeX users.
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 hyplain -- Basic support for multiple languages in Plain TeX.
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 js-misc -- Miscellaneous macros from Joachim Schrod.
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 mkpattern -- A utility for making hyphenation patterns.
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 newsletr -- Macros for making newsletters with Plain TeX.
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 pitex -- Documentation macros.
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 placeins-plain -- Insertions that keep their place.
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 plipsum -- 'Lorem ipsum' for Plain TeX developers.
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 plnfss -- Font selection for Plain TeX.
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 plstmary -- St. Mary's Road font support for plain TeX.
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 present -- Presentations with Plain TeX.
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 resumemac -- Plain TeX macros for resumes.
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 timetable -- Generate timetables.
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 treetex -- Draw trees.
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 varisize -- Change font size in Plain TeX.
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 xii -- Christmas silliness.

Source package