Suggestions for dirtree
The following packages have something in common with the package dirtree. The packages are ordered in decreasing similarity.
- emtrees: Draw labelled trees, using emTeX \specials
 - proofs: Macros for building proof trees
 - tree-dvips: Trees and other linguists' macros
 - qobitree: LaTeX macros for typesetting trees
 - syntrace: Labels for tracing in a syntax tree
 - treetex-plain: Draw trees
 - treedef: Macros to typeset trees in Plain TeX
 - treesvr: Tree macros
 - required: Packages “required” of a LaTeX distribution
 - baum: Trees, using PiCTeX
 - chomsky: Macros to typeset parsing trees
 - drv: Derivation trees with METAPOST
 - ecltree: Trees using epic and eepic macros
 - linguex: Format linguists' examples
 - pstrees: Construct linguistics trees using a preprocessor
 - plainmisc: Miscellaneous contributed macros for plain TeX
 - qtree: Draw tree structures
 - rrgtrees: Linguistic tree diagrams for Role and Reference Grammar (RRG) with LaTeX
 - treetex-ltx209: Draw horizontally- or vertically-oriented trees
 - williams: Miscellaneous macros by Peter Williams
 - xyling: Draw syntactic trees, etc., for linguistics literature, using xy-pic
 - xytree: Tree macros using XY-Pic
 - lingtrees: Linguistics trees preprocessor and macros
 - synttree: Typeset syntactic trees
 - prftree: Macros for building proof trees
 - familytree: Draw family trees
 - dyntree: Construct Dynkin tree diagrams
 - adtrees: Macros for drawing adpositional trees
 - eppstein-trees: Macros for producing trees
 - gl-tree: Linguistic trees with a preprocessor
 - huffman: Drawing binary Huffman trees with METAPOST and METAOBJ