archive.org
Internet Archive text collection for finding scanned books, documents, magazines, and public texts.
Directory
Search results
Published directory entries matching your search.
libgen.fun
Library Genesis mirror for searching books, articles, documents, and academic files.
api.nasa.gov
NASA API is a developer tool, library, or framework for building, testing, or maintaining software.
sci-hub.st
Shadow-library search site often used to find academic papers by DOI, title, or URL.
trantor.is
Shadow-library search page for discovering books, papers, and document files.