Royal Institute Dictionary: meanings in Thai
ETD: Thai-English dictionary
Lexitron-Thaitux: Thai-English dictionary
Lexitron-Meelink: Thai-English dictionary
Longdo: Thai-English dictionary
Thai language: Thai-English dictionary
Tha2English: Thai-English dictionary
usual expressions with sound
usual expressions Thai-English
with sound (Loecsen)
vocabulary & usual phrases (video)
basic vocabulary (with sound) - civil
affaires - medical (Defense
Language Institute)
English-Siamese pronouncing
hand-book by George McFarland (1900)
English-Siamese dictionary
& idiomatic expressions by George McFarland (1903)
Siamese-English dictionary
by Edward Blair Michell (1892) or another version
Siamese-French-English
dictionary by Jean-Baptiste Pallegoix & Jean-Louis Vey (1896)
Dictionnaire français-siamois:
French-Siamese dictionary by Luang Riem Virajbhakaya (1924)
Thai keyboard
Thai alphabet & pronunciation (video)
pronunciation & basic grammar
Thai course & vocabulary
(with sound)
Thai course (with sound)
Thai course (with
sound) (Thai characters) or PDF
format (Latin characters) (US Departement of State)
Elementary hand-book of the
Siamese language by Basil Osborn Cartwright (1906)
Elements of Siamese
grammar by Oscar Frankfurter (1900)
Grammar
of the Thai or Siamese language, by James Low (1828) 
books about Thai language: Google books
& Internet
archive
small stories & Aesop's
fables (with sound)
The Gospel of Matthew: translation in Thai
(1857)
New Testament [PDF]
มนุษย์ทั้งหลายเกิดมาอิสระเสรี และเท่าเทียมกันทั้งศักดิ์ศรีและสิทธิ
ทุกคนได้รับการประสิทธิประสาทเหตุผล และมโนธรรม และควรปฏิบัติต่อกันอย่างฉันพี่น้อง
First article in many languages
Declaration of Human Rights: bilingual text in Thai & other languages

Thailand: maps, symboles, heritage & documents