4 links
D'ni Desk Reference
dnidesk.com
Information about characters, places, and things; and a transcript reference manual.
Guild Hall
geocities.com
Some information about D'ni history, government, guilds, letters and numbers. Also, Riven walkthrough.
Interactive Pocket D'ni Encyclopedia
geocities.com
A program that translates D'ni, converts numbers, teaches grammar, and tells the D'ni date and time.
The Guild of the Mechanists
geocities.com
Description of the D'ni number system and fan fiction journal of another Age.