| teeal.org | The Essential Electronic Agricultural Library (TEEAL) |
| tcaep.co.uk | The Constants and Equations Pages |
| refscout.com | RefScout |
| physlink.com | Physics and Science Reference by PhysLINK.com |
| k-web.org | James Burke's Knowledge Web |
| iicd.org | International Institute for Communication and Development (IICD) |
| icaap.org | International Consortium for the Advancement of Academic Publication (ICAAP) |
| healthinternetwork.org | Health InterNetwork Access to Research Initiative (HINARI) |
| centerpd.org | Center for the Public Domain |
| bookaid.org | Book Aid International |
United States , New Jersey , Mount Laurel