In this page you can find some links that I find interesting, in general:
Useful Sites:
Bureau for Research and Economic Analysis of Development (BREAD)
National Bureau of Economic Research (NBER)
Berkeley Center for Political Economy
Latin American Economic Association (LACEA)
Latin American Economic Association Political Economy Group (LACEA-PEG)
Working Group in African Political Economy (WGAPE)
Center for Effective Global Action (CEGA)
Jameel Poverty Action Lab (J-PAL)
Innovations for Poverty Action (IPA)
Data sources:
Michael Kremer has collected a good group of links and references to development related websites, I would suggest visiting his site
I'll update this with my own links in the near future.