Pattaya Script Font is one of the most popular web fonts, designed by Cadson Demak. Pattaya is a version of Lobster extended into Thai, and supports Latin and all variations of the Thai script with an informal loopless design. However, vertical metrics (that effect line-spacing) had to be adjusted in order to support Thai vowels and tone marks, so this is published as a separate family.
The Pattaya project is led by Cadson Demak, a type foundry in Thailand. To contribute, see github.com/cadsondemak/pattaya