1. Library OPAC (Online Public Access Catalogue)

2. WIPO

3. Research for Life or Research4Life

4. Globethics

5. Directory of Open Access Journals (DOAJ)

6. Public Library of Science

7. African Journals OnLine (AJOL)

8. The Networked Digital Library of Theses and Dissertations (NDLTD)

9. Publications from institutions

10.Google

11.PDF Drive

12.Google Scholar

13.E-booksgo

14.EPDF.PUB

15.Z-Library

16.Christian Classics Ethereal Library

17.Open Access Digital Theological Library

18.Post Reformation Digital Library

19.Religion Online

20.Theological Commons

21.Theology on the Web

22.Tyndale Seminary Christian Theology Reading Room

23.Open source physics

24.Math open references

25.Glosbe

26.The Open Textbook Library

27.Open Stax

28.Wiki books

29.Open culture

30.Epdf tips

31.JSTOR

32.Health Psychology Report

33.The Journal of Ethics and Social Philosophy

34.The Journal of Business Anthropology

35.Approaching Religion

36.Cultural Anthropology

37.Hindawi Geogrphy Journals

38.European Journal of Geography

39.Peer Journal of Life and Environmental Sciences

40.Open Biology

41.BMC Biology is an online open access scientific journal

42.African Journal of Food, Agriculture, Nutrition and Development

43.Agri & Aquaculture Journals

44. The Journal of Architecture

45.The Journal of Architecture

46.Architecture

47.Journal of Asian Architecture and Building Engineering

48.Journal of Architecture and Construction

49.Journal of Architectural Design and Construction Technology

50.Journal of Building Engineering

51.Journal of Agribusiness in Developing and Emerging Economies

52.Agriculture

53.The Open Agriculture Journal

54.International Journal of Water Resources Development

55.Journal of Water Resources Planning and Management

56.Journal of Water Resource and Protection

57.Water Resources Research

58.Water

59.Agricultural Water Management An International Journal