| アレホメタル インク (alejometal inc.) | diversos proyectos; mecatronica, graficos, nihongo, diario, blender, musica, un mundo desconocido, |
| ActionBioscience | examines bioscience issues |
| American Chemical Society | research journals in the chemical and related sciences |
| arXiv | Open access to several e-prints |
| Chinese Academy of Sciences (CAS) | research in basic and technological sciences |
| CogPrints | electronic archive for self-archive papers |
| Colciencias | Instituto Colombiano para el Desarrollo de la Ciencia y la Tecnología |
| Genome News Network | online magazine that covers important developments in genomics research |
| ilustrados | monografías, trabajos de investigación, tesis |
| in-cites | provides commentary and analysis on some of scientific discoveries |
| Internet Public Library | public library of and for the Internet community |
| ISI Highly Cited Researchers | find highly cited researchers |
| Living Reviews | Online-only refereed review journals |
| MailxMail | ofrece formación gratuita por Internet |
| MedBioWorld | medical and biotechnology information resource |
| Molecular Diversity Preservation International (MDPI) | organization for deposit and exchange of molecular and biomolecular samples |
| monografías | tesis, documentos, publicaciones y recursos educativos |
| National Academy of Sciences | publications of The National Academies |
| National Library of Medicine (NLM) | collects materials in all areas of biomedicine and health care |
| Sena Virtual | formación gratuita por internet |
| The Smithsonian/NASA Astrophysics Data System | Digital Library for Physics and Astronomy |
| The Universal Digital Library | significant literary, artistic, and scientific works |
| Wikibooks | open-content textbooks collection |
| Wikipedia | proyecto para escribir comunitariamente enciclopedias libres en todos los idiomas |