ERIC is an online digital library of education research and information. ERIC is sponsored by the Institute of Education Sciences (IES) of the U.S. Department of Education.

The ERIC collection includes annotated bibliographic records (citations, abstracts, and other pertinent data) for more than 1.2 million items indexed since 1966, including:
* journal articles
* books
* research syntheses
* conference papers
* technical reports
* policy papers, and
* other education-related materials

In WARP the NDL has selectively collected Internet resources published within Japan, especially resources that are at risk of vanishing.
You can search archived websites in their original version. In addition, a part of core works extracted from the website such as online publications, white papers, yearbooks, etc. are assigned metadata and stored.

This catalog lists all the digital collections of Bibliotheque nationale de France.

Gallica archives a number of digital documents.

CiNii Books provides holiding information of Japanese academic libraries.

OECD iLibrary is the online library of the Organisation for Economic Cooperation and Development (OECD) featuring its books,  papers and statistics and is the gateway to OECD’s analysis and data.

The INIS Bibliographic Database covers the world's literature on the peaceful applications of nuclear science and technology.

World Contents is a comprehensive discovery service where you can quickly search and access vast amounts of academic information in the world. World Contents can search "deep web" contents which Google or other search engines cannot access.