Suggestions for freealign

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

Package eqexpl: Align explanations for formulas
Package monofill: Alignment of plain text
Package arraycols: New column types for array and tabular environments
Package ntabbing: Simple tabbing extension for automatic line numbering
Package autoaligne: Align terms and members in math expressions
Package arydshln: Draw dash-lines in array/tabular
Package centeredline: A macro for centering lines
Package pas-tableur: Create a spreadsheet layout
Package tabbing: Extended tabbing environment with accented-letter support
Package tabbingbox: Save a tabbing environment in a box
Package ruled-tables: Plain TeX table macros, with ruled capability
Package array: Extending the array and tabular environments
Package eqnalign: Make eqnarray behave like align
Package phfthm: Goodies for theorems and proofs
Package inkpaper: A mathematical paper template
Package mhs: Historical mathematics
Package atendofenv: Add a custom symbol at the end of an environment
Package jmsdelim: A package for compositional delimiter sizing
Package resmes: Measure restriction symbol in LaTeX
Package skmath: Extensions to the maths command repertoir
Package boldtensors: Bold latin and greek characters through simple prefix characters
Package bropd: Simplified brackets and differentials in LaTeX
Package conteq: Typeset multiline continued equalities
Package correctmathalign: Correct spacing of the alignment in expressions
Package cascade: Constructions with braces to present mathematical demonstrations
Package complexpolylongdiv: Typesetting (complex) polynomial long division
Package delim: Simplify typesetting mathematical delimiters
Package delimseasy: Delimiter commands that are easy to use and resize
Package fixdif: Macros for typesetting differential operators
Package flagderiv: Flag style derivation package
Package freemath: LaTeX maths without backslashes