This looks like a useful resource from the British Academy:
PORTAL: the British Academy's online directory of research resources in the humanities and social sciences now contains more than 750 links to research resources in all areas of the humanities and social sciences.
PORTAL covers the whole spectrum of the humanities and social sciences from the history of art to geographical information systems, and from labour history to the indigenous languages of Latin America. The resources listed make full use of the opportunities provided by the new technologies and include texts of major or rare and otherwise difficult-to-locate texts, images of artworks and artifacts, datasets, maps, dictionaries and encylopaedias. Resource-providers include academic departments and research centres, individual academics, libraries, museums, government departments and ministries, and non-governmental, international and supranational organisations. Resources, all of which are free at the point of use, are selected on the basis of their high quality and potential usefulness to researchers, and must demonstrate currency, proper functionality, and responsible management.
PORTAL is organised as a simple directory. For each resource listed, a short description and set of key words and phrases is compiled. These resource descriptions are listed alphabetically under 18 broad subject headings. A search tool and index of keywords and phrases are available to assist users in finding resources relevant to their subject.
Although it is primarily intended for use by post-doctoral researchers, PORTAL is freely available to the whole education community, and it has been selected for inclusion in EDSITEment, The Best of the Humanities on the Web from the U.S. National Endowment for the Humanities.