- Analecta: spoglio dei periodici italiani
- Associazione ESSPER: periodici italiani di economia, scienze sociali e storia
- Eric: Institute of Education Sciences
- Herihplus – European Reference Index for the Umanities and Social Sciences
- Italinemo: riviste di italianistica nel mondo
- JournalTOCs: the latest journal tables of contents
- Jstore
- Rivisteweb: la piattaforma italiana per le scienze umane e sociali
- Cambridge Dictionary
- Encyclopedia.com
- Encyclopaedia Britannica
- The Free Dictionary: allows to create own personal homepage by adding and removing, dragging and dropping, and “using or losing” existing content windows
- Il nuovo De Mauro: il dizionario di italiano dalla a alla z
- The Online Books Page: Dictionary of the History of Ideas, di P. Wiener, electronic edition; based on the 1974 print edition
- Scholarpedia: the peer-reviewed open-access encyclopedia, where knowledge is curated by communities of experts
- Stanford Encyclopedia of Philosophy
- Treccani
- Ultralingua: Amazing apps for people who love languages
- YourDictionary: a comprehensive reference site with synonyms, sentence examples, quotes, biographies, and an amazing collection of grammar-related articles and education resources
- Academia.edu: sito web per ricercatori dedicato alla condivisione delle pubblicazioni scientifiche
- J-Global
- Mendeley: free reference manager and academic social network
- ResearchGate: discover scientific knowledge
- ScienceOpen: research + publishing network, a professional networking platform for scholars to enhance their research in the open, make an impact, and receive credit for it
- Social Science Space: a space to explore, share and shape the issues facing social scientists
- SSRN: Social Science Research Network: is devoted to the rapid worldwide dissemination of research and is composed of a number of specialized research network
- BibMe: the fully automatic bibliography maker that auto-fills
- BIBTeX resource: strumento utilizzato per la formattazione di liste di riferimenti bibliografici utilizzato dal software di scrittura LATEX
- Bibus Bibliographic software
- ENDNOTE: strumento di gestione bibliografica
- Open Journal Systems
- Zotero: a free, easy-to-use tool to help you collect, organize, cite, and share research sources
- ABU: la Bibliothèque universelle
- Alex Catalogue of Electronic Texts
- L’antiquité grecque et latine du moyen âge
- Bartleby: Great Books Online
- BVMM: Bibliothèque virtuelle des manuscrits médiévaux
- Les classiques des sciences sociales
- DART-Europe E-theses Portal
- Darwin online
- Digital Book Index
- eBooks@Adelaide: free books, online
- Erudit – Promouvoir et diffuser la recherche et la creation
- Internet Archive: digital library of free books, movies, software, music, websites
- The Internet Classics Archive
- IntraText: Digital Library
- The OALSTER database: a union catalog of millions of records that represent open access resources
- OAPEN Open Access: online library and publication platform
- OMACL: the Online Medieval and Classical Library
- The Online Books Page
- OpenEdition: portail de ressources électroniques en sciences humaines et sociales
- Open Library: an open, editable library catalog, building towards a web page for every book ever published
- Persée: portail de revues en sciences humaines et sociales: accès libre et gratuit à des collections complètes de publications scientifiques (revues, livres, actes de colloques, publications en série, sources primaires, etc.) associé à une gamme d’outils de recherche et d’exploitation
- Perseus Digital Library: repertorio di testi greci e latini, spesso corredati dalla traduzione in inglese e da un opportuno commento critico
- Project Gutenberg: free ebooks
- SciELO: Scientific Electronic Library Online
- ScienceDirect (Elsevier): explore scientific, technical, and medical research for peer-reviewed journals, articles, book chapters and open access content
- SpringerOpen: offer researchers from all areas of science, technology, medicine, the humanities and social sciences a place to publish open access in journals and books
- UC Press E-Books Collection, 1982-2004, formerly eScholarship Editions
- Wikibooks: progetto multilingue per la redazione di libri di testo, manuali, libri commentati, dal contenuto libero e gratuito, sviluppati in forma collaborativa
- Wiley Open Access: a program of fully open access journals
- Zentrales Verzeichnis Digitalisierter Drucke
- Archives Online at Indiana University: a portal for accessing descriptions of Special Collections and Archives from libraries, archives, and other units at Indiana University Bloomington and from other institutions around the state of Indiana
- Brandeis Institutional Repository: a resource for the Brandeis community to showcase, organize, share, and preserve research and scholarship in an Open Access repository
- Deep Blue: University of Michigan: articles, book chapters, videos, dissertations at University of Michigan
- HAL: Archive ouverte en Sciences de l’Homme et de la Société
- Pleiadi: Portale per la letteratura scientifica elettronica italiana su archivi aperti e depositi istituzionali
- ROAR: a searchable international Registry of Open Access Repositories indexing the creation, location and growth of open access institutional repositories and their contents
- Sapienza Digital Library: raccoglie in un unico sistema di deposito digitale e mette a disposizione dell’intera comunità accademica la produzione intellettuale passata e futura della Sapienza, quella già nata digitale (born digital) o tradotta successivamente in formato digitale attraverso un processo di digitalizzazione
- SocArxiv: open archive of the social science
- SSOAR: Social Science Open Access Repository, database ad accesso aperto dedicato a pubblicazioni scientifiche riguardanti le scienze sociali
- University of Oxford Text Archive: develops, collects, catalogues and preserves electronic literary and linguistic resources for use in Higher Education, in research, teaching and learning. The OTA also gives advice on the creation and use of these resources, and is involved in the development of standards and infrastructure for electronic language resources
- Zenodo: archivio open access per le pubblicazioni e i dati di tutti i ricercatori del mondo
- AMS Historica: collezione digitale di opere storiche
- BEIC: Biblioteca europea di informazione e cultura
- Biblioteca digitale del Museo Galileo di Firenze
- Biblioteca digitale della Biblioteca Estense universitaria di Modena
- Biblioteca Italiana: biblioteca digitale di testi rappresentativi della tradizione culturale e letteraria italiana dal Medioevo al Novecento
- Bibliotheca Palatina Digital
- British library – Digital collection
- Gallica: la bibliothèque numérique de la Bibliothèque nationale de France: en libre accès, elle regroupe des livres numérisés, des cartulaires, des revues, des images, des enregistrements sonores, des cartes et une collection d’enluminure
- HathiTrust: Digital Library: a collection of millions of titles digitized from libraries around the world
- Internet culturale: cataloghi e collezioni digitali delle biblioteche italiane
- Calvin Jean – The John Calvin Bibliography
- The National Library of Israel – Digital Library
- NDLTD: Networked Digital Library of Theses and Dissertations
- The New York Public Library: Digital Collections