The Seeker's Index
Free
The Seeker's Index is a curated guide to the best free learning and research resources available online.
Inside, you'll find:
Free course platforms where you can build real skills and earn certificates at no cost
University-level open courseware from institutions like Carnegie Mellon
Digital archives and libraries including the Library of Congress, National Archives, and Internet Archive
Tools for locating primary sources, historical documents, and academic materials
Guidance on where to start and which resource fits which kind of research