 | | Search Engines |
|  | Baidu (baidu.com/)Baidu was founded in 2000 and it is the most popular search engine in China. Its market share is increasing steadily and according to Wikipedia, Baidu is serving billions of search queries per month. It is currently ranked at position 6, in the Wikipedia Website Rankings. Although Baidu is accessible worldwide, it is only available in the Chinese language. |
| | BASE (base-search.net)One of the world's most voluminous search engines especially for academic web resources. BASE provides more than 120 million documents from more than 6,000 sources. You can access the full texts of about 60% of the indexed documents for free (Open Access). |
| | Bing (https://www.bing.com/)The best alternative search engine to Google is Microsoft Bing. Bing’s search engine share is between 2.83% and 12.31%. Bing originated from Microsoft’s previous search engines (MSN Search, Windows Live Search, Live Search), and according to Wikipedia is the #26 most visited website on the Internet. |
| | CiteSeerX (citeseerx.ist.psu.edu) A scientific literature digital library and search engine that focuses primarily on the literature in computer and information science. Indexes now 1.5 million documents. |
| | CS-structure Academic Search (cs-structure.inr.ac.ru/)Scholarly search that expands and simplifies search over CiteSeer. |
| | FreeFullPDF (freefullpdf.com)PDF search engine for free scientific publications. FreeFullPDF performs full-text search in PDF files (title, abstract, authors, materials and methods, results, conclusion, bibliographies). |
| | Global ETD Search (search.ndltd.org/)Global ETD Search searches over 4 million electronic theses from around the planet. Created by the Networked Digital Library of Theses and Dissertations (NDLTD) the search tool offers a Google like search interface with advanced features. |
| | Google Scholar (scholar.google.com)A freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines. |
| | JournalMap (www.journalmap.org/)A scientific literature search engine that empowers you to find relevant research based on location and biophysical attributes combined with traditional keyword searches. All publications are geotagged based on reported location information and plotted on a world map showing where the research was conducted allowing you to easily visualize the research occurring in specific areas and show you where data gaps might exist. |
| | Matilda (matilda.science/?l=en) ► The open academic search engine Matilda is an open academic search engine and a bibliographic and bibliometric platform for Open Science. Since 2019, the development of the Matilda platform has been coordinated by Didier Torny (CNRS). It brings together 2 partners: the Centre de sociologie de l'innovation (I3, UMR 9217) and Huma-Num (UAR 3598)It is named after the Matilda effect which describes downplaying or overlooking the scientific contributions and achievements of women. Aiming to make references and citation data as usable as Open Access scholarly texts and datasets, the search engine adopts a principle of equal treatment of academic documents and their metadata. The tool searches more than 141 million research works and hopes to replace the bibliometric tools of commercial databases (Web of Science, Scopus) on the one hand and Google Scholar's opaque hierarchization on the other hand. |
| | Mednar (mednar.com/)A free, medically-focused deep web search engine providing a search of authoritative public and deep web resources, returning the most relevant results to one easily navigable page. |
| | OAIster (oaister.worldcat.org/)Contains records of digital resources from open-archive collections worldwide. More than 23 million records representing digital resources from more than 1,100 contributors. OAIster is a union catalog of open access resources that was built by harvesting from open access collections worldwide using the Open Archives Initiative Protocol for Metadata Harvesting (OAI-PMH). |
| | Openverse (openverse.org/?referrer=creativecommons.org) ► Openverse is a search engine for openly-licensed media which gives you access to over 600 million Creative Commons licensed and public domain image and audio files. All files can be used free of charge. An extensive library of free stock photos, images, and audio, available for free use. All Openverse content is under a Creative Commons license or is in the public domain. |
| | Poisk Knig (Book Search) (poiskknig.ru)A search engine for freely downloadable books or books available in online bookstores of Russia. |
| | RefSeek (www.refseek.com)A search engine for students and scientists. |
| | Scholar.ru (www.scholar.ru) Search of Russian theses, dissertations and research papers in all fields of knowledge. |
| | Science.gov (www.science.gov) A gateway to U.S. government science information. Science.gov searches over 60 databases and over 2,200 scientific websites to provide users with access to more than 200 million pages of authoritative federal science information including research and development results. |
| | Science-advisor.net (science-advisor.net) A free articles search engine and online-forum for scientific discussions. |
| | ScienceResearch (scienceresearch.com)A free, publicly available deep web search engine. |
| | Scinapse (scinapse.io) Scinapse is a free, nonprofit, academic search engine for papers, serviced by Pluto Network. |
| | Search Engine Colossus (www.searchenginecolossus.com/) Search Engine Colossus offers links to a large number of country- or region-specific search engines. The search engines are organized by country and supplied with a link to the service, to the language(s) it uses, to the origin point, and a short description when available. |
| | SearchOnMath (searchonmath.com) ► A search engine designed especially for mathematical content from several areas of knowledge. Unlike traditional, text-only search tools, SearchOnMath is able to search for mathematical formulas and/or text. Currently its index has about 11 million different formulas. |
| | Semantic Scholar (www.semanticscholar.org/)An artificial-intelligence backed search engine for academic publications developed at the Allen Institute for AI and publicly released in November 2015. It uses advances in natural language processing to provide summaries for scholarly papers. |
| | Trove (trove.nla.gov.au/)Trove is an Australian online library database aggregator; a free faceted-search engine hosted by the National Library of Australia, in partnership with content providers including members of the National & State Libraries Australasia. It is one of the most well-respected and accessed GLAM (galleries, libraries, archives, and museums) services in Australia, with over 70,000 daily users. |
| | Vadlo (vadlo.com/) ► Life sciences search engine for laboratory methods, techniques, protocols, molecular databases and bioinformatic tools, commercial products, kits, and powerpoints. |
| | Wolfram Alpha (www.wolframalpha.com/) A computational knowledge engine or answer engine developed by Wolfram Alpha LLC, a subsidiary of Wolfram Research. It provides answers to users based on built-in data and algorithms. |
| | WorldWideScience (worldwidescience.org)A global science gateway connecting you to national and international scientific databases and portals. WorldWideScience.org accelerates scientific discovery and progress by providing one-stop searching of global science sources. |
