Data and research
If you are searching for a specific kind of information or data, using a specialized and focused search tool can give you better results with less effort. Research Sites that Google hides has a list and other Redditors share their faves.
- www.refseek.com - Academic Resource Search. More than a billion sources: encyclopedia, monographies, magazines.
- www.worldcat.org - a search for the contents of 20 thousand worldwide libraries. Find out where lies the nearest rare book you need.
- https://link.springer.com - access to more than 10 million scientific documents: books, articles, research protocols.
- www.bioline.org.br is a library of scientific bioscience journals published in developing countries.
- http://repec.org - volunteers from 102 countries have collected almost 4 million publications on economics and related science.
- www.science.gov is an American state search engine on 2200+ scientific sites. More than 200 million articles are indexed.
- www.base-search.net is one of the most powerful researches on academic studies texts. More than 100 million scientific documents, 70% of them are free
- ResearchGate
- unpaywall.com - An open database of 52,423,403 free scholarly articles. We harvest Open Access content from over 50,000 publishers and repositories, and make it easy to find, track, and use.
- Libgen
- Sci-hub is back, baby!
- CiteSeerX - Penn State's search includes more than 10,000,000 documents, journals, and papers
- Semantic Scholar - A free, AI-powered research tool for scientific literature
Images
- Cold War Military Slides presents a historical rabit hole that is worthy of your time. Beautiful Public Data reports that a “reporter stumbled upon a treasure trove of Department of Defense slides from the 1970s and 1980s depicting data from missile systems, Soviet capabilities and America’s nuclear arsenal.” Follow along. So cool.
- Get free SVG images and icons, modified Pixabay images, from SVG SILH. All are released under Creative Commons CC0. Categories include animals, symbols, men, letters, computers, and women.
- Museums and educational institutions have made much of their collections open and usable for free. Yale Center for British Art’s The Mountain Torrent by Francis Danby (Francis Danby, 1793–1861, The Mountain Torrent, between 1820 and 1830, Oil on canvas, Yale Center for British Art, Paul Mellon Collection, B1973.1.10.) is in the public domain. Find other works at Open Culture.
- “This month, the team at The Public Domain Review launched a new project aimed at artists, illustrators, designers, and creatives of all stripes. Containing 10,000+ items, the Public Domain Image Archive is a vast trove of illustrations, prints, scans, and more, all downloadable and free for use.”
“The database offers a functional search that allows users to sort by artist, time period, style, and theme. For those seeking maximum visual stimulus, there’s also an “Infinite View” option that collates images of all types into a navigatable grid.” (Source)