Suggestions for ifthen

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

Package xifthen: Extended conditional commands
Package structuredlog: Report files opened and closed in the log, including nesting level
Package ifallfalse: Compare a string against a set of other strings
Package switch: A constant time/expandable switch/case
Package ifthenx: Extra tests for \ifthenelse
Package makegobbler: Keep or drop some part of LaTeX source code
Package comment: Selectively include/exclude portions of text
Package multiaudience: Several versions of output from the same source
Package optional: Facilitate optional printing of parts of a document
Package tagging: Document configuration with tags
Package version: Conditionally include text
Package xcomment: Allows selected environments to be included/excluded
Package versions: Optionally omit pieces of text
Package memoize-ext: Extended support for memoization with Memoize
Package syntonly: Run a document through LaTeX for syntax checking
Package fix-cm: Permit Computer Modern fonts at arbitrary sizes
Package codesection: Provides an environment that may be conditionally included
Package conditext: Define and manage conditional content
Package phfcc: Convenient inline commenting in collaborative documents
Package renditions: Multiple versions from the same content
Package hideanswer: Generate documents with and without answers by toggling a switch
Package doc: Format LaTeX documentation
Package graphicscache: Cache includegraphics calls
Package luacensor: Securely redact sensitive information using Lua
Package to-be-determined: Highlight text passages that need further work
Package forloop: Iteration in LaTeX
Package memoize: Externalization of graphics and memoization of compilation results in general
Package fixltx2e: Patches for LaTeX
Package shortvrb: Abbreviated verbatim commands
Package alltt: Everything in tt font, but obey commands and line endings
Package inputenc: Accept different input encodings