Suggestions for L3regex

The following packages have something in common with the package L3regex. The packages are ordered in decreasing similarity.

Package expl3: Wrapper package for experimental LaTeX3
Package l3docstrip: Strip documentation in LaTeX3 source
Package l3kernel: LaTeX3 programming conventions
Package l3kernel-dev: Development pre-release of l3kernel
Package functional: An intuitive functional programming interface for LaTeX2
Package l3packages: High-level LaTeX3 concepts
Package l3keys2e: LaTeX2ε option processing using LaTeX3 keys
Package xargs: Define commands with many optional arguments
Package etl: Expandable token list operations
Package l3experimental: Experimental LaTeX3 concepts
Package afterpage: Execute command after the next page break
Package somedefs: Save loading all of another package
Package trace: Make sensible use of TeX tracing in LaTeX
Package xspace: Define commands that appear not to eat spaces
Package zhlipsum: Chinese dummy text
Package xgalley: Control text feeding onto the page
Package showkeys: Show label, ref, cite and bib keys
Package xfp: Interface to the LaTeX3 floating point unit
Package xparse: A generic document command parser
Package xtemplate: A high-level interface for declaring document commands
Package amsbsy: Produce bold math symbols (AMS-LaTeX)
Package array: Extending the array and tabular environments
Package fileerr: LaTeX’s mechanisms for dealing with file errors
Package helvet: Load Helvetica, scaled
Package pifont: Access to PostScript standard Symbol and Dingbats fonts
Package rawfonts: Low level font compatibility mode for LaTeX
Package shellesc: Unified shell escape interface for LaTeX
Package psnfss: Font support for common PostScript fonts
Package kalendarium: Print dates according to the classical Latin calendar
Package erw-l3: Utilities based on LaTeX3
Package cdcmd: Expandable conditional commands for LaTeX