Suggestions for adjustbox
The following packages have something in common with the package adjustbox. The packages are ordered in decreasing similarity.
- boites: Boxes that may break across pages
 - framed: Framed or shaded regions that can break across pages
 - mdframed: Framed environments that can split at page boundaries
 - ncccropbox: Crop-marked boxes
 - joinbox: Join boxes vertically or horizontally
 - hvfloat: Controlling captions, fullpage and doublepage floats
 - coloredtheorem: A colourful boxed theorem environment
 - tcolorbox: Coloured boxes, for LaTeX examples and theorems, etc.
 - beamer-varbox: Provide beamer boxes with variable size corners
 - rotate: Rotate TeX boxes
 - pdf-trans: A set of macros for various transformations of TeX boxes
 - rotate-textures: Box rotation macros for Textures
 - callouts-box: Provides visually appealing callout boxes
 - copyrightbox: Provide copyright notices for images in a document
 - manuscript: Emulate look of a document typed on a typewriter
 - decimal: LaTeX package for the English raised decimal point
 - eqell: Sympathetically spaced ellipsis after punctuation
 - emarks: Named mark registers with e-TeX
 - foreign: Systematic treatment of ‘foreign’ words in documents
 - lips: Text ellipses in LaTeX
 - nolbreaks: No line breaks in text
 - titles: Titles of books, articles, etc. in LaTeX
 - thinsp: A stretchable \thinspace for LaTeX
 - xellipsis: Extremely configurable ellipses with formats for various style manuals
 - extdash: A range of dash commands for compound words
 - subscript: Provides the \textsubscript command
 - impnattypo: Support typography of l’Imprimerie Nationale Française
 - titlecaps: Setting rich-text input into Titling Caps
 - bxorigcapt: To retain the original caption names when using Babel
 - blowup: Upscale or downscale all pages of a document
 - dotlessi: Provides dotless i’s and j’s for use in any math font