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/