PHP Thai->Unicode converter
PHP function by Adul Tanthuvanit to convert Thai text in Unicode. The result of this function can be used with ImageTTFText(). Click on "Télécharger" to get the script (the page is in French).
http://dev.nexen.net/scripts/details.php?scripts=614

Software.thai.net
Webring devoted to the development of open source projects and standards suitable for Thai speakers.
http://software.thai.net/

Thai Information Technology Standards
Specification of the standards in use in the Thai IT field and links to papers on Thai language processing.
http://www.nectec.or.th/it-standards/

Thai Linux Working Group.
Contains both content in English and Thai.
http://linux.thai.net/

XFree86 Thai Supports
Theppitak Karoonboonyanan presents the encoding, fonts, input methods used for Thai under XFree86.
http://linux.thai.net/~thep/th-xwindow/

ZzzThai project
Information on how to use the Thai language on Windows, Solaris, Linux, and Macintosh. Provides free fonts & keyboard layouts.
http://www.fedu.uec.ac.jp/ZzzThai/