Suggestions for joinbox

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

Package beamer-varbox: Provide beamer boxes with variable size corners
Package hvfloat: Controlling captions, fullpage and doublepage floats
Package ncccropbox: Crop-marked boxes
Package adjustbox: Graphics package-alike macros for general boxes
Package rotate: Rotation support for TeX boxes
Package rotate-textures: Box rotation macros for Textures
Package pdf-trans: A set of macros for various transformations of TeX boxes
Package callouts-box: Provides visually appealing callout boxes
Package coollist: Manipulate COntent Oriented LaTeX Lists
Package getargs: A flexible list-parsing macro with configurable parsing character
Package reflectgraphics: Techniques for reflecting graphics
Package readarray: Read, store and recall array-formatted data
Package na-box: Arabic-aware version of pas-cours package
Package coloredtheorem: A colourful boxed theorem environment
Package boites: Boxes that may break across pages
Package tcolorbox: Coloured boxes, for LaTeX examples and theorems, etc.
Package mdframed: Framed environments that can split at page boundaries
Package framed: Breakable framed and shaded boxes
Package bitset: Handle bit-vector datatype
Package dataref: Manage references to experimental data
Package getitems: Gathering items from a list-like environment
Package jsonparse: Parse, store and access JSON data in LaTeX documents
Package latex2pydata: Write data to file in Python literal format
Package mfirstuc: Uppercase the first letter of a word
Package stringstrings: String manipulation for cosmetic and programming application
Package scalerel: Constrained scaling and stretching of objects
Package commalists-tools: Manipulate numeral comma separated lists
Package datatool: Tools to load and manipulate data
Package jsonresume: A minimal LuaLaTeX package for rendering JSON Resume data into LaTeX documents
Package db: Process simple databases inside LaTeX
Package datatool-english: English language support for datatool.sty v3.0+