Suggestions for hyphsubst

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

Package hypgotoe: Links to embedded files
Package hyphenat: Disable/enable hyphenation
Package eolgrab: Catch arguments delimited by end of line
Package flags: Setting and clearing of flags in bit fields
Package enparen: Consistent nested brackets
Package bmpsize: Extract size and resolution data from bitmap files
Package chemarr: Arrows for chemists
Package engord: Converts numbers to English ordinal numbers
Package hypbmsec: Hypertext bookmarks in sectioning commands
Package fibnum: Generate Fibonacci numbers
Package centernot: Centred \not command
Package iflang: Expandable checks for the current language
Package resizegather: Automatically resize overly large equations
Package rotchiffre: Perform simple rotation cyphers
Package stampinclude: Inclusion based on .aux file date stamps
Package stackrel: Enhancement to the \stackrel command
Package thepdfnumber: Print PDF numbers with minimal digits
Package twoopt: Definitions with two optional arguments
Package settobox: Assigning dimensions of a box to a length register
Package setouterhbox: Set hbox in outer horizontal mode
Package ifdraft: Detect draft and final class options
Package pdfcolparcolumns: Fix colour problems in package parcolumns
Package pdfcolparallel: Fix colour problems in package parallel
Package classlist: Record classes used in a document
Package protecteddef: Define protected commands
Package pdfcrypt: Allows the setting of pdf encryption
Package testhyphens: Testing hyphenation patterns
Package colonequals: Colon equals symbols
Package oberdiek: A bundle of packages submitted by Heiko Oberdiek
Package luahyphenrules: Loading patterns in LuaLaTeX with language.dat
Package lua-check-hyphen: Mark hyphenations in a document, for checking