Brazil
Extensive site on Brazilian boundaries with nine other territories, including archive
Ecuador/Peru
Binational plan for border region development
US government summary of Ecuador/Peru agreements
Odeen Ishmael's History of the Guyana/Venezuela Border Issue
Border and Transcultural Studies Research Circle at the University of Wisconsin: an academic grouping mainly concerned with “borders” in the new (mainly US) sense of inter-cultural frontiers
The Howard R. Lamar Center for the Study of Frontiers and Borders at Yale University -- Centre for the advanced historical study of North American frontiers and borders, as well as the comparative study of the frontier experience throughout the world.
USA/Mexico
Border Counties Coalition - US/Meixco policy forum
Border & Latin American Information listing of New Mexico State University (NMSU) Library; NMSU also publishes Frontera NorteSur bulletin on US/Mexico borderlands
Border EcoWeb provides public access to environmental information for the US/Mexican border region
Border Environment Cooperation Commission, an intergovernmental agency
Consortium for North American Higher Education Collaboration (CONAHEC)Border PACT electronic network for higher education, with links to conference and other documents
Borderlands Environmental Archives, with extensive links on ecotourism and US/Mexico issues
Americas Program -- Incorporates the previous Border Information and Outreach Service (BIOS, formerly INCITRA), and its bulletin borderlines, alongside a new e-mail based updater called Crossborder Updater
Center for Inter-American and Border Studies (CIBS) -- Official site at the University of Texas at El Paso (UTEP). See also the UTEP Borderlands Encyclopedia
Center for US-Mexican Studies, University of California, San Diego, including Fellowships for Border Studies
Earlham College Border Studies Program
International Boundary and Water Commission
Living on the Border -- Website introducing personalised documentary of life on the US-Mexico border with many telling photographs.
Monterrey Centro de Calidad Ambiental (Environmental Quality Centre) listing (in Spanish) of resources on cross-border environmental issues
Southwest Center for Environmental Research & Policy (SCERP), a consortium of five US and four Mexican universities
Texas Center for Border Economic and Enterprise Development, a consortium of three Texan universities addressing socio-economic and educational issues in the border region
Texas Council for the Humanities Border Studies graphical exhibitions, learning resources and activities
Transboundary Resource Inventory Program (TRIP), a joint project to map and measure natural resources
Udall Center for Studies in Public Policy Directory of Research at the University of Arizona Relating to the US/Mexico Borderlands
US-Mexico Border Information Center on Air Pollution
United States/Canada
The Great Lakes Information Network
International Joint Commission (prevents and resolves disputes between the United States of America and Canada under the 1909 boundary Waters Treaty)