Suggestions for lroundrect

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

Package alertmessage: Alert messages for LaTeX
Package nccboxes: Elaborate box commands
Package shadbox: Shade the background of any box
Package parboxx: Two extra alignment options for \parbox
Package callouts-box: Provides visually appealing callout boxes
Package lucide-admonitions: Provides environments for rendering admonition boxes in multiple languages
Package pbox: A variable-width \parbox command
Package roundbox: Round boxes in LaTeX
Package crbox: Boxes with crossed corners
Package graphicxbox: Insert a graphical image as a background
Package ghab: Typeset ghab boxes in LaTeX
Package minipage-marginpar: Minipages with marginal notes
Package makebox: Defines a \makebox* command
Package tram: Typeset tram boxes in LaTeX
Package ktbox: Framework for semantic color, structured highlighting, and scholarly communication
Package pynotebook: pynotebook presents (raw, Markdown or Python) codes (and execution with LuaLaTeX) as in a Jupyter Notebook
Package fitbox: Fit graphics on a page
Package genmpage: Generalization of LaTeX’s minipages
Package postit: A LaTeX package for displaying Post-it notes
Package creationboites: Macros to create simple tcolorbox with some customizations
Package ascmac: Boxes and picture macros with Japanese vertical writing support
Package boxedminipage: Framed minipages of a specified total width (text and frame combined)
Package codebox: Highlighted source code in a fancy box
Package dashbox: Draw dashed boxes
Package eqparbox: Create equal-widthed parboxes
Package efbox: Extension of \fbox, with controllable frames and colours
Package framedsyntax: Typeset the syntax of commands and environments within coloured boxes
Package fbox: Extended \fbox macro from standard LaTeX
Package fancybox: Variants of \fbox and other games with boxes
Package leporello: A simple LaTeX document class to create folded leaflets using columns and boxes
Package longfbox: Draw framed boxes with standard CSS attributes that can break over multiple pages