World Bank E-library: Welcome 
One of the most comprehensive collection in the area of social and economic development. It covers all current and recent World Bank titles, documents and papers in PDF and other user-friendly formats. It has more than 1,396 World Bank Publications and over 1,938 Policy Research Working Papers.
ProQuest EBooks Central
It offers an increasing selection of more than 20,000 e-Books in business, economics, computers, engineering and technology.
Pakistan Research Repository
Pakistan Research Repository: is a project of the Higher Education Commission to promote the international visibility of research originating out of institutes of higher education in Pakistan. It provides a free, single-entry access point to view the manuscript of research executed, and distribute this information as widely as possible.
Questia Digital Library 
Questia Digital Library: Questia is the online library that provides 24/7 access to the world's largest online collection of over 67,000 books and 155,000 journal articles in the humanities and social sciences.