Some database fall outside to the study of history, but contain valuable and relevant historical information:
Anthropology Online
AnthroSource
AtoZ Maps Online
Berg Fashion Library
Eighteenth Century Collections Online
Empire Online
Ethnographic Video Online
Ethnomusicology: Global Field Recordings
Missionary Archives from Lesotho, 1832-2006
When searching databases from other disciplines, it can be helpful to qualify your keyword searches with terms like: historical, traditional, migrant, ect. This can help to weed out results that are not relevant to your inquiry.