lets you type Thai with keys that correspond to the sounds of the letters, much in the same way that Apple does with its layouts such as "Tibetan - QWERTY", "Turkish - QWERTY", and others. Apple didn't provide a QWERTY Thai layout, so I made one myself.
Instructions for quick installation and use are included.
Developed and tested on Mac OS X 10.5.4, will work with 10.5 and 10.4. May work on 10.3.