Suggestions for Expkv-opt

The following packages have something in common with the package Expkv-opt. The packages are ordered in decreasing similarity.

Package expkv-def: A key-defining frontend for expkv
Package expkv: An expandable key=val implementation
Package expkv-cs: Define expandable key=val macros using expkv
Package expkv-bundle: An expandable key=val implementation and friends
Package yax: Yet Another Key System
Package simplekv: A simple key/value system for TeX and LaTeX
Package luakeyval: A minimal key/value system for LuaTeX based on token.scan_key_cs
Package luakeys: A Lua module for parsing key-value options
Package wrtfile: Write TeX files from a TeX document
Package lparse: Parse macro arguments with Lua using xparse-like specification
Package clefval: Key/value support with a hash
Package keyval2e: A lightweight and robust key-value parser
Package keyreader: A robust interface to xkeyval
Package options: Provides convenient key-value options for LaTeX package writers
Package pgfkeyx: Extended and more robust version of pgfkeys
Package skeyval: Key-value parsing combining features of xkeyval and pgfkeys
Package xkeymask: An extension of xkeyval with a mask
Package ltxkeys: A robust key parser for LaTeX
Package pst-xkey: Key-value syntax for PSTricks packages
Package pgfkeysearch: Find keys in a given path recursively
Package hu-berlin-bundle: LaTeX classes for the Humboldt-Universität zu Berlin
Package catoptions: Preserving and recalling standard catcodes
Package kvdefinekeys: Define keys for use in the kvsetkeys package
Package kvoptions: Key value format for package options
Package kvsetkeys: Key value parser with default handler support
Package skeycommand: Create commands using parameters and keyval in parallel
Package xkeyval: Extension of the keyval package
Package keycommand: Simple creation of commands with key-value arguments
Package keyval: Process key=value schemes
Package frankenbundle: Develop and distribute LaTeX packages and classes and BibTeX styles
Package tvs: TeX Versioning System