Suggestions for williams

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

Package treesvr: Tree macros
Package qobitree: LaTeX macros for typesetting trees
Package syntrace: Labels for tracing in a syntax tree
Package adtrees: Macros for drawing adpositional trees
Package dirtreex: Directory tree rendering for LaTeX with TikZ
Package dyntree: Construct Dynkin tree diagrams
Package familytree: Draw family trees
Package xytree: Tree macros using XY-Pic
Package xyling: Draw syntactic trees, etc., for linguistics literature, using xy-pic
Package ecltree: Trees using epic and eepic macros
Package rrgtrees: Linguistic tree diagrams for Role and Reference Grammar (RRG) with LaTeX
Package synttree: Typeset syntactic trees
Package lingtrees: Linguistics trees preprocessor and macros
Package cdcmd: Expandable conditional commands for LaTeX
Package forloop: Iteration in LaTeX
Package lambdax: Use Lambda expression within LaTeX
Package stack: Tools to define and use stacks
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 bxenclose: Enclose the document body with some pieces of code
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