The Internet Archive has also a full-text article search (for older papers, iirc): https://scholar.archive.org https://scholar.archive.org "Sci Hub" is also p

The Internet Archive has also a full-text article search (for older papers, iirc): https://scholar.archive.org https://scholar.archive.org "Sci Hub" is also popular in the science community. This is a shadow library that "collects" articles from other publishers websites and makes them available free of charge. Maybe the most important feature though is that it has a single search field and it does not matter where the article was initially published at. https://en.wikipedia.org/wiki/Sci-Hub https://en.wikipedia.org/wiki/Sci-Hub