Suggestions for spacingtricks

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

Package hang: Environments for hanging paragraphs and list items
Package abbrevs: Text abbreviations in LaTeX
Package suppose: Abbreviate the word Suppose
Package langnames: Name languages and their genetic affiliations consistently
Package figureversions: Figure versions for LaTeX
Package magaz: Magazine layout
Package leading: Define leading with a length
Package mdwtools: Miscellaneous tools by Mark Wooding
Package dimnum: Commands for dimensionless numbers
Package asciilist: Environments AsciiList and AsciiDocList for prototyping nested lists in LaTeX
Package enumsub: Aligned inline sublists for enumitem
Package revnum: Reverse enumerate
Package outline: List environment for making outlines
Package desclist: Extended description lists
Package shortlst: Compact lists by running several items per line
Package coolfn: Typeset long legal footnotes
Package footmisx: A range of footnote options
Package fnpara: Footnotes in paragraphs
Package multifootnote: Multiple numbers for the same footnote
Package savefnmark: Save name of the footnote mark for reuse
Package yafoot: A bundle of miscellaneous footnote packages
Package gatherenum: A crossover of align* and enumerate
Package labels4easylist: Add reference labels to easylist items
Package sitem: Save the optional argument of \item
Package iitem: Multiple level of lists in one list-like environment
Package lazylist: Lists in TeX’s mouth
Package asternote: Annotation symbols enclosed in square brackets and marked with an asterisk
Package osda: Commands for Proceedings of the Workshop on Open-Source Design Automation
Package chifoot: Chicago-style footnote formatting
Package fnbreak: Warn for split footnotes
Package fn2end: Convert footnotes to endnotes