Suggestions for boldline

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

Package decorule: Decorative swelled rule using font character
Package multicolrule: Decorative rules between columns
Package sltables: Simplified tables for LaTeX
Package dashundergaps: Produce gaps that are underlined, dotted or dashed
Package fnlineno: Number the lines of footnotes
Package lineno: Line numbers on paragraphs
Package ltablex: Table package extensions
Package stabular: Multipage tabular
Package supertabular: A multi-page tables package
Package tabularray: Typeset tabulars and arrays with LaTeX3
Package xtab: Break tables across pages
Package cassette-shipunov: Print labels for audio cassettes
Package altverse: Typesetting verse
Package autolist: More lists
Package drcaps: Simple dropped capitals
Package blkarray: Extended array and tabular
Package bigdelim: Big delimiters in tabular or array
Package ctable: Flexible typesetting of table and figure floats using key/value directives
Package diagbox: Table heads with diagonal lines
Package ltcaption: Fix some caption problems in longtables
Package multirow: Create tabular cells spanning multiple rows
Package polytable: Tabular-like environments with named columns
Package threeparttable: Tables with captions and notes all the same width
Package tabls: Better vertical spacing in tables and arrays
Package vcell: Vertical alignment of content inside table cells
Package widetable: An environment for typesetting tables of specified width
Package easytable: A simple package for writing tables
Package listliketab: Typeset lists as tables
Package threeparttablex: Notes in longtables
Package warpcol: Relative alignment of rows in numeric columns in tabulars
Package biolist: List observed species