Suggestions for expex

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

Package expex-acro: Wrapper for the expex package
Package expex-glossonly: Help gb4e, linguex, and covington users use the ExPex glossing macros
Package gb4e: Linguistic tools
Package qtree: Draw tree structures
Package paracol: Multiple columns with texts in parallel
Package dirtree: Display trees in the style of windows explorer
Package musixtex: Sophisticated music typesetting
Package xypic: Flexible diagramming macros
Package autoaligne: Align terms and members in math expressions
Package epsf: Simple macros for EPS inclusion
Package hlist: Horizontal and columned lists
Package soul: Hyphenation for letterspacing, underlining, and more
Package systeme: Format systems of equations
Package xlop: Calculates and displays arithmetic operations
Package pst-tree: Trees, using PSTricks
Package chemfig: Draw molecules with easy syntax
Package fixjfm: Fix JFM (for *pTeX)
Package polexpr: A parser for polynomial expressions
Package witharrows: Aligned math environments with arrows for comments
Package pst-node: Nodes and node connections in PSTricks
Package midnight: A set of useful macro tools
Package arcs: Draw arcs over and under text
Package linguex: Format linguists’ examples
Package tipauni: Producing Unicode characters with TIPA commands
Package ifvtex: Detects use of VTeX and its facilities
Package ifluatex: Provides the \ifluatex switch
Package nth: Generate English ordinal numbers
Package ifpdf: Provides the \ifpdf conditional
Package ifetex: Provides \ifetex switch
Package ctablestack: Catcode table stable support
Package ifxetex: Am I running under XeTeX?