Suggestions for FIFO Stack

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

Package stack: Tools to define and use stacks
Package cdcmd: Expandable conditional commands for LaTeX
Package forloop: Iteration in LaTeX
Package lambdax: Use Lambda expression within LaTeX
Package mwrite: Write information to files
Package functional: An intuitive functional programming interface for LaTeX2
Package lt3rawobjects: Objects and proxies in LaTeX3
Package l3packages: High-level LaTeX3 concepts
Package arraysort: Sort arrays (or portions of them)
Package beamertools: A collection of programming tools for beamer
Package clistmap: Map and iterate over LaTeX3 clists
Package catoptions: Preserving and recalling standard catcodes
Package cmdstring: Get command name reliably
Package catchfilebetweentags: Catch text delimited by docstrip tags
Package conv-xkv: Create new key-value syntax
Package doafter: Do things after a group
Package fetchcls: Fetch the current class name
Package gmutils: Support macros for other packages
Package hobsub: Construct package bundles
Package hopatch: Load patches for packages
Package keyparse: Key based parser
Package ltxutil: LaTeX utility macros
Package lt3graph: Provide a graph datastructure for experimental LaTeX3
Package lmacs: A simple package for including support files
Package locality: Various macros for keeping things local
Package ltxtools: A collection of LaTeX API macros
Package lmake: Process lists to do repetitive actions
Package lhelp: Miscellaneous helper packages
Package memory: Containers for data in LaTeX
Package macrolist: List operations for LaTeX2ε
Package macroswap: Swap the definitions of two LaTeX macros