- Google https://www.google.com/The largest and most popular search engine for text, image, video and more
- YouTube https://www.youtube.com/Video search engine
- Bing https://www.bing.com/Microsoft search engine
- DuckDuckGo https://duckduckgo.com/Search engine that places particular emphasis on the protection of the user’s personal date and the avoidance of filtered, personalized results to eliminate the possibility of filter bubble
- CC Search https://ccsearch.creativecommons.org/Search engine focused on Creative Commons licensed content
- Lycos http://www.lycos.com/Oldest search engine in operation
- SweetSearch https://www.sweetsearch.com/SweetSearch performs searches only within selected sites that have been evaluated by scientists, teachers and librarians. Search results are constantly being assessed to ensure the best user experience.
- Dogpile https://www.dogpile.com/Meta-search engine that simultaneously gathers and produces results from leading search engines, such as Google, Yahoo!, Yandex, Bing and more.
Other search tools
- Europeana https://www.europeana.eu/en : Europeana or the European Digital Library opened its doors to the public on November 20,2008. The European digital library provides access to two million books, maps, recordings, photographs, archival documents, paintings and films, materials from the national libraries and cultural institutions of the 27 Member States of the European Union.
- New York Public Library Best of the Web https://www.nypl.org/collections/nypl-recommendations/best-of-webList of sites selected by librarians of the New York Public Library
- Google Books https://books.google.com/?hl=enFull-text search engine among millions of books digitized as part of the Library Project. Full text access is available books belonging to the public domain.
- findingDulcinea http://www.findingdulcinea.com/An online guide that aims to help users search for information by providing test, reliable and high quality material.
- Sources https://www.sources.com/A searchable database compiled by specialized media professionals.
- Library and Archival Exhibitions on the Web – https://www.sil.si.edu/SILPublications/Online-Exhibitions/Collection of over 300 links to online library exhibitions, archives and museums around the world.
Encyclopedias and Dictionaries
- The Internet Encyclopedia of Philosophy https://www.iep.utm.edu/Founded in 1995 with the aim of providing access to detailed, academic, peer reviewed, information sources on philosophy and philosophers
- Wordnik http://www.wordnik.com/ – Online dictionary designed to gather all the words in the English language.It provides definitions and etymologies from various, recognized dictionaries.
- Stanford encyclopedia of Philosophy https://plao.stanford.edu/ Philosophy encyclopedia.Entries are constantly enriched and renewed by teams of specialized scientists.
- Khan Academy https://www.khanacademy.org/Khan Academy offers hands-on practice materials, educational videos and a personalized learning environment to help students study at their own pace in and out of the classroom.It has content related to Mathematics, Science, Programming, History, Art History, Economics and more.It collaborates with organizations such as NASA, the Museum of Modern Art, MIT and others to develop its content.
- Subject Finder http://www.subjectfinder.com/Searchable database of educational websites, including Teum Teklehaimanot teaching and learning materials.
- DOAJ.org https://doaj.org/– Directory of Open Access Journals. The journals cover all branches of the arts and sciences.All magazines are peer reviewed.
- WolframAlpha https://www.wolframalpha.com/Computational search engine. Unlike common search engines that return results on the user’s query, WolframAlpha returns precise answers. Extremely useful in all branches of science.
- NRICH https://nrich.maths.org/ NRICH is an innovative collaboration between the Departments of Mathematics and Pedagogical Studies at the University of Cambridge. It provides access to thousands of free math resources for students aged 3 to 18, covering all stages of education.
- Math Guide http://www.mathguide.de/: reliable information on the science of Mathematics (in English)
- Physics World https://physicsworld.com/: thematic portal of Physics (in English).
- Sci Central https://www.scicentral.com/: scientific, thematic portal covering Biosciences, Health Sciences, Physics and Chemistry, Earth and Outer Space, as well as Technological Sciences.
- ADS https://archaeologydataservice.ac.uk/ : thematic portal of Archaeology in Great Britain.
- iDAI https://idai.world/ : Portal of the German Archaeological Institute (DAI).It is a digital research environment based on tools and repositories that all researchers, historians and archaeologists to collect, analyze, examine, study, publish and store research data and creative products.
- The Digital Atlas of Roman and Medieval Civilizations https://darmc.harvard.edu/Maps and databases with information on many aspects of Roman and Medieval Civilizations.
- Artcyclopedia http://www.artcyclopedia.com/Database dedicated to the fine arts.
- Google Arts & Culture https://artsandculture.google.com/Online platform that allows viewing of artworks in high resolution. Available in 18 languages.
- Web Gallery of Art https://www.wga.hu/This is a virtual museum and searchable database of European fine arts from the 3rd to the 19th century.
- Visual Arts Data Service https://vads.ac.uk/: thematic portal of visual arts (in English)