Ultra-Larn  
   Ularn introduces character classes and new levels, monsters, spells, and items. Basic strategy, spoilers, and source files.
   http://www.cordier.com/ularn/

Ularn.org  
   Ultra-Larn 1.5 broadens support to include most modern UNIX systems. Changelog and source files.
   http://www.ularn.org/

iLarn  
   Palm OS port of Ularn. Changelog, tips, source and executable files, and build instructions.
   http://roguelike-palm.sourceforge.net/iLarn/

MIT Spoiler Collection  
   Contributed hints and walkthroughs originally posted to Usenet.
   http://www.mit.edu/afs/athena/contrib/games/doc/larn/

Ularn Spoilers/Reference  
   Commentary and sets of well-organized data tables and formulae taken from source files.
   http://www.consistent.org/terran/ularn.txt

Ularn 1.6  
   Upgrade adds graphic interface support. Screenshot, notes, Unix/X11 and Windows sources, and Windows executable.
   http://www.users.bigpond.com/jolds/ularn.htm

Variant Ularn  
   Independent reworking. Background, changelog, and source.
   http://people.qualcomm.com/ntenny/larn.html

Larn  
   Synopsis and feature list. Links to UNIX source files and Amiga, Atari, and DOS executables.
   http://roguelikes.sauceforge.net/pub/larn/