The Thai Language - By Mahidol University. - http://www.mahidol.ac.th/thailand/language.html
Thai Language Page - General overview of the Thai language in various aspects including Thai language lessons and Thai poetry. - http://thaiarc.tu.ac.th/thai/introth.htm
Courage Software - Information on a software course for learning Thai, with some free basic information on the language. - http://www.couragesoftware.com
Wikipedia: Thai language - Introduction with sections on dialects, script, grammar and phonology. - http://en.wikipedia.org/wiki/Thai_language
Thai Internet Education Project - Tools for Thai students of English, and overseas students of Thai, including information reference cards and sections on phonetics in each language. - http://seasrc.th.net/tie/index.htm
Learn Thai - Basic information on pronunciation, tones, pronouns, and numbers, in English, Thai script and phonetic transcription. - http://www.kisa.ca/thai/
Thaitrans.com - Thai translation and localization services. - http://qtranslation.com/ttrans/
Thai-language.com - Message boards and reference information on the language, plus a dictionary. - http://www.thai-language.com
Craig Schuler - Personal web site of a UK-based Thai language translator and literary student. - http://craig.schuler.name/
Profile of the Thai Language - Overview of the language including its basic tonal, morphological and grammatical structure, a language map and collectional of bibliographic references. - http://www.seasite.niu.edu/thai/LLF/profile.htm
Thai Phrasebook in RealAudio - A collection of common Thai phrases in English, Thai transliteration and recorded in RealAudio format. - http://www.bangkok.com/phrasebook/home.shtml
ThaiTrainer111 - Software for learning the Thai language in German, English, France and Dutch. - http://www.j-m-s.de/sw/thai111.htm
Soc Culture Thai Language FAQ - Contains language and linguistics information for the soc.culture.thai newsgroup. - http://www.faqs.org/faqs/thai/language/
Thailinguist - Provides English to Thai and Thai to English translation services. - http://www.thailinguist.com/