| 451 |
Instituto Antonio Carlos Jobim | Brazil | personal | | | |
| 452 |
Instituto de Altos Estudios Nacionales | Ecuador | academic | 1.8.x JSP | | |
| 453 |
Instituto de Comunicação e Informação Científica e Tecnológica em Saúde ICICT | Brazil | academic | | | |
| 454 |
Instituto de educação superior Anísio Teixeira | Brazil | academic | 1.3.x and earlier | | |
| 455 |
INSTITUTO DE ESTUDIOS DEL PETROLEO | Ecuador | academic | | | |
| 456 |
Instituto de Investigaciones Sociales | Mexico | academic | 1.6.x JSP | | |
| 457 |
Instituto Geológico Minero y Metalurgico INGEMMET | Peru | government | 1.8.x XML | | |
| 458 |
Instituto Gulbenkian de Ciência | Portugal | academic | 1.6.x JSP | | |
| 459 |
Instituto Humboldt | Colombia | research center | 1.4.x | | |
| 460 |
Instituto Interamericano de Cooperación para la Agricultura IICA oficina en Colombia | Colombia | research center | | | |
| 461 |
Instituto Nacional de Estadística y Censos | Ecuador | government | | | |
| 462 |
Instituto Nacional de Saúde Dr. Ricardo Jorge (INSA) | Portugal | academic | | | |
| 463 |
Instituto Politécnico de Bragança | Portugal | academic | | | |
| 464 |
Instituto Politécnico de Castelo Branco | Portugal | academic | | | |
| 465 |
Instituto Politécnico de Leiria, Portugal | Portugal | academic | 1.6.x JSP | | |
| 466 |
Instituto Politécnico de Santarém, Repositório Cie | Portugal | academic | 1.6.x JSP | | |
| 467 |
Instituto Politécnico Nacional, Mexico | Mexico | academic | 1.4.x | | |
| 468 |
Instituto Superior de Ciências do Trabalho e da Empresa | Portugal | academic | | | |
| 469 |
Instituto Superior de Engenharia do Porto ISEP-GILT | Portugal | academic | | | |
| 470 |
Instituto Superior de Psicologia Aplicada | Portugal | academic | | | |
| 471 |
Instituto Superior Politécnico Gaya | Portugal | academic | 1.6.x JSP | | |
| 472 |
Instituto Superior Técnico | Portugal | academic | | | |
| 473 |
Instituto Tecnológico de Costa Rica | Costa Rica | academic | 1.7.x XML Manakin | | |
| 474 |
Instituto Tecnológico y de Estudios Superiores de Occidente (ITESO) | Mexico | academic | 1.8.x XML | | |
| 475 |
Inter-University Centre for Astronomy and Astrophysics | India | academic | 1.4.x | | |
| 476 |
InterContinental Hotels Group | United States | commercial | 1.3.x and earlier | | |
| 477 |
International Crops Research Institute for the Semi Arid Tropics (ICRI | India | research center | | | |
| 478 |
International Development Reseach Center | Canada | research center | | | |
| 479 |
International Renaissance Foundation | Ukraine | nonprofit | 1.6.x JSP | | |
| 480 |
International Rice Research Institute | Philippines | nonprofit | | | |
| 481 |
INTERNATIONAL SOCIETY OF ACADEMIC AND INDUSTRIAL RESEARCH | Sweden | research center | 1.8.x XML | | |
| 482 |
International Society of Horticultural Science | Belgium | other | | | |
| 483 |
International Water Management Institute | Sri Lanka (ex-Ceilan) | nonprofit | 1.7.x XML Manakin | | |
| 484 |
Internatoinal Online Multidisciplinary Journal | India | other | 1.3.x and earlier | | |
| 485 |
InterSalud | Spain | other | | | |
| 486 |
Irisidea | India | commercial | 1.7.x XML Manakin | | |
| 487 |
Islamiah College,Vaniyambadi | India | academic | 1.4.x | | |
| 488 |
Islamic Science University of Malaysia | Malaysia | academic | 1.6.x XML Manakin | | |
| 489 |
Istanbul Technical University (ITU) | Turkey | academic | | | |
| 490 |
Istituto Superiore di Sanità (ISS) | Italy | government | 1.6.x JSP | | |
| 491 |
ITD - CNR | Italy | research center | 1.7.x JSP | | |
| 492 |
ITS | Indonesia | academic | 1.4.x | | |
| 493 |
IUGONET Metadata DB | Japan | academic | 1.7.x JSP | | |
| 494 |
Ivan Franko National University of Lviv, Centre for Humanities | Ukraine | academic | | | |
| 495 |
Iwate University | Japan | academic | | | |
| 496 |
Japan Advanced Institute of Science and Technology | Japan | academic | | | |
| 497 |
Japan International Cooperation Agency | Japan | other | | | |
| 498 |
Jet Propulsion Laboratory, California Institute of Technology/NASA | United States | government | | | |
| 499 |
Jikei University | Japan | academic | | | |
| 500 |
Jimma University Library System | Ethiopia | academic | 1.6.x JSP | | |
