Turkic Languages - http://www.turkiclanguages.com/ Includes a classification of the Turkic languages, and Turkish suffix list, by Lars Johanson and Éva Csató.
Turkic-Related Mailing Lists - http://www.khazaria.com/turkic/lists.html Lists for several languages, presented at the Turkic Republic and Communities website.
Omniglot: Orkhon - http://omniglot.com/writing/orkhon.htm Presentation of the Orkhon or Old Turkic runes.
Türkçestan: Oriëntaal's Links to Turkic Languages - http://users.telenet.be/orientaal/turkcestan.html List of links to sites containing written documents and/or audio materials of Turkic languages.
Ancient Turk Rock Inscriptions in the Talass Ala-Too - http://www.transoxiana.com.ar/Eran/Articles/kljashtorny.html Brief article by S. G. Klyashtorny in "Webfestschrift Marshak", describing an Old Turkic inscription containing a Sogdian word.