Suggestions for ptex-base

The following packages have something in common with the package ptex-base. The packages are ordered in decreasing similarity.

Package uptex-base: Plain TeX formats and documents for upTeX
Package ptex2pdf: Convert Japanese TeX documents to PDF
Package platex: pLaTeX2ε and miscellaneous macros for pTeX
Package uplatex: pLaTeX2ε and miscellaneous macros for upTeX
Package plain: The Plain TeX format
Package base: Definitive source of Plain TeX on CTAN
Package fixjfm: Fix JFM (for *pTeX)
Package context: The ConTeXt macro package
Package platex-tools: pLaTeX standard tools bundle
Package ptex-manual: Japanese pTeX manual
Package japanese-otf-uptex: Support for Japanese OTF files in upLaTeX
Package latexrelease: LaTeX release emulation
Package cslatex: LaTeX support for Czech/Slovak typesetting
Package csplain: Plain TeX multilanguage support
Package pxbase: Tools for use with (u)pLaTeX
Package jsclasses: Classes tailored for use with Japanese
Package jlreq-deluxe: Multi-weight Japanese font support for the jlreq class
Package pxcjkcat: LaTeX interface for the CJK category codes of upTeX
Package pxjahyper: Hyperref support for pLaTeX
Package pxtatescale: Patch to graphics driver for scaling in vertical direction of pTeX
Package pxchfon: Japanese font setup for pLaTeX and upLaTeX
Package pxrubrica: Ruby annotations according to JIS X 4051
Package japanese-otf: Advanced font selection for platex and its friends
Package latex-base: Base sources of LaTeX
Package latex-base-dev: Development pre-release of the LaTeX kernel
Package ptex-fontmaps: Font maps and configuration tools for Japanese/Chinese/Korean fonts with (u)ptex
Package minim: A modern plain format for the LuaTeX engine
Package pxufont: Emulate non-Unicode Japanese fonts using Unicode fonts
Package pxjodel: Help change metrics of fonts from japanese-otf
Package plautopatch: Automated patches for pLaTeX/upLaTeX
Package jlreq: Japanese document class based on requirements for Japanese text layout