Oskicat [UC Berkeley]
Melvyl [UC, selected UCB libraries not in Oskicat]
Other librarians at UCB have created these helpful Guides to Finding Government Information.
Intergovernmental Organization (IGO) Information
Custom Google Search:Use the following search box to search across hundreds of IGO websites
Non-Governmental Organization (NGO) Information
Custom Google Search: Use the following search box to search across hundreds of NGO sites. Sites were chosen based on their consultative status with the United Nations Economic and Social Council (ECOSOC) and also collated from curated lists.
Search Think Tanks and Research Centers
Link to a Google Custom Search of more than 590 think tanks and research centers.