Blackink Publishing
Telanis' writings and games are designed to encourage you to puzzle out the language of the D'ni. There is also a Myst-like Age rendered in webpages to explore.
D'ni Color Symbols
Analysis of the D'ni color symbols used in Riven.
D'ni Desk Reference
Information about characters, places, and things; and a transcript reference manual.
D'ni Linguistic Fellowship
A community and discussion forum for experienced and aspiring D'ni linguists.
Guild Hall
Some information about D'ni history, government, guilds, letters and numbers. Also, Riven walkthrough.
Guild of Linguists
An in-depth study of the D'ni language, with lessons on phonetics, grammar, vocabulary, and the number system, as well as the D'ni font for download. Also available in French and German.
Interactive Pocket D'ni Encyclopedia
A program that translates D'ni, converts numbers, teaches grammar, and tells the D'ni date and time.
The D'ni Restoration Council
An independent, informal group of individuals whose main purpose is to oversee the exploration and restoration of D'ni.
The Guild of the Mechanists
Description of the D'ni number system and fan fiction journal of another Age.