A survey project is implementing two surveys on endangered languages, one concerning language and technology, the other about everyday use. The project appears to be a collaboration between professors at the Indiana University–Purdue University Fort Wayne and the Universidad de Puerto Rico. According to the initial page, the survey will be kept online indefinitely, with the results added to a website.
David Nathan has a site filled with resources for the languages of Australia and Torres Strait. Although some links are outdated, one leads to the AusAnthrop Australian Aboriginal tribal database, which is filled with information, including alternative names for peoples of Australia. Another leads to the Federation of Aboriginal & Torres Strait Islander Languages & Culture, with lots of information and resources. Another link leads to music in Gumatj (gnn) on the Yothu Yindi website. Lots to explore here!
In addition to many other materials, EYDES or Evidence of Yiddish (yid) Documented in European Societies has a collection of some 6000 hours of tape recordings as part of their Language and Culture Atlas of Ashkenazic Jewry. The project also has a Yiddish course (taught in German).