From the Southeast Asia Library Group Blog:
The University of Pennsylvania and National Library of Laos have launched the Digital Library of Northern Thai Manuscripts as a resource for the study of traditional literature from this region. At present, the digital library contains images of over 4,200 manuscripts which can be searched and viewed online or freely downloaded, and to which more manuscripts will be added subsequently.
The database contains four collections: digitised microfilms from the Preservation of Northern Thai Manuscripts Project (with permission of Chiang Mai University Library), digitised microfilms and also handwritten copies of manuscripts made in the early 1970s during research conducted by Harald Hundius, and directly-digitised manuscripts made during the current digital library project.