Suggestions for xtemplate

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

Package xfp: Interface to the LaTeX3 floating point unit
Package xparse: A generic document command parser
Package l3keys2e: LaTeX2ε option processing using LaTeX3 keys
Package l3packages: High-level LaTeX3 concepts
Package xargs: Define commands with many optional arguments
Package etl: Expandable token list operations
Package inlinedef: Inline expansions within definitions
Package letltxmacro: Let assignment for LaTeX macros
Package expl3: Wrapper package for experimental LaTeX3
Package zhlipsum: Chinese dummy text
Package namedef: TeX definitions with named parameters
Package functional: An intuitive functional programming interface for LaTeX2
Package styledcmd: Handling multiple versions of user-defined macros
Package ccool: A key-value document command parser
Package ltxnew: A simple means of creating commands
Package xoptarg: Expandable macros that take an optional argument
Package xnewcommand: Define \global and \protected commands with \newcommand
Package optparams: Macros with multiple optional parameters
Package xcoffins: Rich boxed material for LaTeX 3
Package xfrac: Split-level fractions
Package hawkdraw: Draw vector graphics using l3draw with a simple syntax
Package cdcmd: Expandable conditional commands for LaTeX
Package lambdax: Use Lambda expression within LaTeX
Package mathcommand: \newcommand-like commands for defining math macros
Package l3experimental: Experimental LaTeX3 concepts
Package cssyntax: Readable, self-documenting command names for LaTeX package authors
Package lparse: Parse macro arguments with Lua using xparse-like specification
Package defstring: Define macros as verbatim macros
Package getoptk: Define macros with sophisticated options
Package forloop: Iteration in LaTeX
Package l3regex: Regular expression facilities for LaTeX