Suggestions for obsolete

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

Package required: Packages required of a LaTeX distribution
Package plainmisc: Miscellaneous contributed macros for plain TeX
Package gl-tree: Linguistic trees with a preprocessor
Package tree-dvips: Trees and other linguists’ macros
Package wotree: Draw Warnier/Orr diagrams
Package pst-tree: Trees, using PSTricks
Package emtrees: Draw labelled trees, using emTeX \specials
Package treedef: Macros to typeset trees in Plain TeX
Package treesvr: Tree macros
Package treetex-plain: Draw trees
Package qobitree: LaTeX macros for typesetting trees
Package syntrace: Labels for tracing in a syntax tree
Package tex-references: References for TeX and Friends
Package luatex-pkg: Basic definitions for LuaTeX
Package macbibtex: BibTeX for the Macintosh
Package unpacked: LaTeX source files in unpacked form
Package winemtex: EmTeX for windows
Package eppstein-trees: Macros for producing trees
Package chomsky: Macros to typeset parsing trees
Package adtrees: Macros for drawing adpositional trees
Package drv: Derivation trees with METAPOST
Package dirtreex: Directory tree rendering for LaTeX with TikZ
Package dyntree: Construct Dynkin tree diagrams
Package familytree: Draw family trees
Package proofs: Macros for building proof trees
Package pstrees: Construct linguistics trees using a preprocessor
Package pst-qtree: Simple syntax for trees
Package pst-tvz: Draw trees with more than one root node, using PSTricks
Package qtree: Draw tree structures
Package treetex-ltx209: Draw horizontally- or vertically-oriented trees
Package tikz-qtree: Use existing qtree syntax for trees in TikZ