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Reaxys
Reaxys is a database of experimentally validated data for chemists including structures, reactions (including multi-step reactions) and physical properties.

Research Papers in Economics (RePEc)
Provides access to working papers on economics, banking and finance.

Royal Anthropological Institute (RAI) Archive
The RAI was founded in 1871 to promote anthropological contributions to public affairs, culture, education, and society. The institute’s archive contains nearly one million pieces of unique content, including research data, papers, and fieldwork. It also includes drawings and photographs as part of a 150,000-image library dating to the 1860s.

Royal College of Physicians Archive – Part I: 1101-1862 
This archive focuses on the history of medicine, from folklore to modern public health policy between the 12th and 19th century. Digitised primary sources include manuscripts, personal papers of College fellows, medical reports, and images.