The Doris Duke Collection of American Indian Oral History at the University of Oklahoma's Western History Collection provides online access to typescripts of interviews (1967 -1972) conducted with hundreds of Indians in Oklahoma regarding the histories and cultures of their respective nations and tribes.
The digital representation of the typescripts are organized by tribe but may be searched by interviewee, by interviewer, by tape number, or by keyword searching of the full-text of the transcript.
A discontinued project by Google to scan and index historic newspapers, the Google News Archive is still available and a great resource that makes many difficult to find newspapers available freely online.
The ProQuest Dissertations & Theses Global (PQDT) database is the world's most comprehensive curated collection of multi-disciplinary dissertations and theses from around the world, offering over 5 million citations and 3 million full-text works from thousands of universities.
Sefaria is a non-profit organization offering free access to over 3,000 years of Jewish texts, translations, and commentaries so that everyone can participate in the ongoing process of studying, interpreting, and creating Torah.