libthai-dev 0.1.12-1ubuntu0.2 (amd64 binary) in ubuntu karmic

 LibThai is a set of Thai language support routines aimed to ease
 developers' tasks to incorporate Thai language support in their applications.
 It includes important Thai-specific functions e.g. word breaking, input and
 output methods as well as basic character and string supports.
 .
 This package contains the development libraries and header files you need to
 develop your programs using the LibThai library.