Following sources provide extensive links to different resources, which are frequently needed for Economists.
ELDIS: The gateway to Development Information
Gametheory.net: A resource for educators and students of game theory
Inomics: Internet Site for Economists
ISID Online index to Indian Social Science Periodicals
International Affairs Resources: WWW virtual library
Library of Economics and Liberty
Planning Commission, Govt of India [Niti Aayog]
