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Arxiv
An open access repository that provides access to more than 1 million full-text scientific publications on mathematics, physics, informatics, finance, statistics and economics.
BASE
One of the largest open-access search engines for scientific resources.
Bepress Legal Repository
Open access to legal institutions and universities to various publications, working papers and conference proceedings on the topics of law, business, education, engineering, physical and social sciences.
BioMed Central
Open access journals in medicine, biology, biomedical engineering, biotechnology and other related fields.
Britannica Online
An encyclopedia with articles on various article.
CiteSeerX
This database provides access to scientific literature focused mainly on the fields of computer and information sciences.
Cogprints
This database consists of open access scientific articles on biology, computer science, linguistics, medicine, psychology, philosophy.
Connected Papers
A search engine that helps researchers and scholars discover the most relevant and important research papers in their field. The tool generates graphs and analyses documents, selecting dozens of research papers with the strongest links to the query.
De Gruyter books
This open access database provides access to e-books and scientific journals in the social sciences, humanities and STEM.
Digital Commons Network
It is full-text scientific journal articles, book chapters, dissertations, conference papers in the following fields of science: architecture, art, business, education, engineering, law, health.
Directory of Open Access Books (DOAB)
The primary aim of DOAB is to increase discoverability of Open Access books. 
Directory of Open Access Journals (DOAJ)
DOAJ is a community-curated online directory that indexes and provides access to high quality, open access, peer-reviewed journals.
E – LiS
International repository of librarianship and information science data. Access provided to more than 22 thousand documents: scientific articles, conference proceedings, books, reports, dissertations covering librarianship and information science topics. 
eBooks by Mykolas Romeris University
The ebooks are presented by advanced and modern means in the portal ebooks.mruni.eu. The readers may read all books presented in the portal online or to download them into his/her computer or other reading device.
Encyclopedia Mythica

ePaveldas
It is the largest digital cultural heritage portal in Lithuania.
European patent database

Eurovoc
Multilingual Thesaurus for the European Community institutions document information processing.
Find Sound
It is a free site where you can search the Web for sound effects. It is a Web search engine, like Google and Yahoo, but with a focus on sounds. It provides powerful features, yet is simple and easy to use, and suitable for all ages.
Google Books
eBooks search system.
Google Scholar
Google Scholar is a freely accessible web search engine that indexes the full text or metadata of scholarly literature across an array of publishing formats and disciplines.
Gutenberg
More than 60 thousand open access e-books covering the fields of education, geography, history, psychology, philosophy, religion, art sciences.
HighWire Press
HighWire Press is the largest archive of free full-text science on Earth.
Infoscience
In this database users can find articles, conference reports, e-books in the fields of engineering, natural and technological sciences.
InTech
Open access journals and books on natural, technological, medical, social sciences and humanities.
Library of Congress
One of the world's largest libraries, with a vast collection of information sources - books, photographs, manuscripts, maps, etc. The library has built up comprehensive digital collections on humanities subjects, including history, culture, art, photography, folklore, etc.
Lithuanian Academic Electronic Library (eLABa)
A database of bachelor's and master's theses and dissertations defended in Lithuania.
Lithuanian Cultural Heritage Information System Aruodai
Aruodai - is an information system designed to collect philologigal heritage.
Lithuanian Data Archive for HSS (LiDA)
It is a virtual digital infrastructure for data acquisition, long-term preservation and dissemination. 
Lituanistika
The International Research Database "Lituanistika" has been created since 2006 funded by European Union Structural Funds. The objective is research on humanities and social sciences about:the past and present of Lithuanian State society, culture, nation and language.
Martynas Mažvydas National Library of Lithuania

Mendeley
Mendeley is a free reference manager and PDF organizer, academic social network that can help you organize your research, collaborate with others online, and discover the latest research.
OAPEN Library
The OAPEN Library contains freely accessible academic books, mainly in the area of humanities and social sciences. OAPEN works with publishers to build a quality controlled collection of open access books, and provides services for publishers, libraries and research funders in the areas of deposit, quality assurance, dissemination, and digital preservation.
Online Books Page
Open access e-books of fiction and scientific literature. Users can search for books applying various criteria.
Open Access Button
You can enter the title, URL, DOI or other information to search for free open access articles. The OA button also offers a plug-in for Chrome and Firefox browsers. Once the plugin is installed in your browser, it will automatically search for an open access article. When an open access article is not found, the OA button allows you to contact the author directly and ask the author to share the article for free.
OpenDissertations (EBSCO Publishing)
An open-access database built to assist researchers in locating both historic and contemporary dissertations and theses. Providing researchers with citations to graduate research across a span of time, from the early 20th century to the present, this database will continue to grow through regular updates and new partnerships with graduate degree-granting institutions.
OpenEdition Books
The Library of humanities and social sciences provides e-books, most of them are open access publications. There can be found e-books on art topics (art, music, architecture, performing arts, cinema).
Patents of the Republic of Lithuania
Electronic invention database presents information on published patent applications, issued patents and changes of information and legal statuses.
Philosophy. Sociology
Periodical scientific journal published since 1990.
PLoS Public Library of Science
Open access to biomedical journals containing biotechnology-related information.
Polytechnical Dictionary
Dictionary provides modern physical and technological sciences terms.
Project Gutenberg
Project Gutenberg was the first provider of free electronic books, or eBooks. Michael Hart, founder of Project Gutenberg, invented eBooks in 1971 and his memory continues to inspire the creation of eBooks and related technologies today.
RSC Gold excluding Archive
Access to 46 peer-reviewed journals published by the Royal Society of Chemistry. The database includes chemistry and related sciences such as biology, biophysics, energy, environmental engineering, materials, physics, and more.
Scopus
Scopus is the largest abstract and citation database of peer-reviewed literature: scientific journals, books and conference proceedings. 
SEP (Stanford Encyclopedia of Philosophy)
An open-access encyclopaedia of philosophical topics.
SSRN (Social Science Research Network)
This is an open-access social science database.
Text Translation
Translation system.
The International Who's Who
A database of biographies that provides readers with detailed biographical information of the most talented, famous, and influential men and women in a variety of professions from around the world.
The Internet Encyclopedia of Philosophy
The Internet Encyclopedia of Philosophy (IEP) (ISSN 2161-0002) was founded in 1995 as a non-profit organization to provide open access to detailed, scholarly information on key topics and philosophers in all areas of philosophy.
The Networked Digital Library of Thesis and Dissertations (NDLTD)
The Networked Digital Library of Theses and Dissertations (NDLTD) is an international organization dedicated to promoting the adoption, creation, use, dissemination, and preservation of electronic theses and dissertations (ETDs).
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