Suggestions for visualtoks

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

Package etoolbox-generic: A loader for etoolbox.sty in non-LaTeX formats
Package chemfig: Draw molecules with easy syntax
Package polexpr: A parser for polynomial expressions
Package eoldef: Define commands which absorb the whole source line as arguments
Package texapi: Macros to write format-independent packages
Package collargs: Collect arguments of any command
Package localloc: Macros for localizing TeX register allocations
Package tokmap: Iterate over a token list expandably, without dropping spaces or braced groups
Package plainpkg: A minimal method for making generic packages
Package addtoluatexpath: Add paths to Lua packages and input TeX files
Package calcfrac: Calculates the value of an expression containing fractions
Package fltpoint: Simple floating point arithmetic
Package langcode: Simple language-dependent settings based on language codes
Package advice: Extend commands and environments
Package expkv-cs: Define expandable key=val macros using expkv
Package ltxcmds: Some LaTeX kernel commands for general use
Package namedef: TeX definitions with named parameters
Package pdftexcmds: LuaTeX support for pdfTeX utility functions
Package catcodes: Generic handling of TeX category codes
Package yax: Yet Another Key System
Package chinese-jfm: Luatexja-jfm files for Chinese typesetting
Package expex-acro: Wrapper for the expex package
Package hologo: A collection of logos with bookmark support
Package iftex: Am I running under pdfTeX, XeTeX or LuaTeX?
Package luakeyval: A minimal key/value system for LuaTeX based on token.scan_key_cs
Package luakeys: A Lua module for parsing key-value options
Package lua-placeholders: Specifying placeholders for demonstration purposes
Package stretchy: Macros for creating stretchy TeX symbols
Package youngtab: Typeset Young-Tableaux
Package fits-astro: Retrieving FITS file header information in LuaTeX
Package lua-calendrica: Lua implementation of Calendrical Calculations by Dershowitz & Reingold