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| • | DAIRYLANDO | |
| • | DAR - DERECHO DE AUTOR REGIONAL | |
| • | DART-EUROPE E-THESES PORTAL | |
| • | DDJ - DR. DOBB'S SOFWARE TOOLS FOR THE PROFESSIONAL PROGRAMMER | |
| • | DICCIONARIOS DE ELMUNDO.ES | |
| • | DICIONARIO DA LINGUA PORTUGUESA ON-LINE | |
| • | DICT.CC | |
| • | DICTIONNAIRE DE L'ACADEMIE FRANCAISE | |
| • | DIMENSIONS | |
| • | DIN - DEUTSCHES INSTITUT FUR NORMUNG (ALEMANIA) | |
| • | DIRECCION NACIONAL DE VIALIDAD | |
| • | DIRECCION NACIONAL DE PROTECCION CIVIL | |
| • | DIVA - ACADEMIC ARCHIVE ON-LINE | |
| • | DOAJ - DIRECTORY OF OPEN ACCESS JOURNALS | |
| • | DOE DATA EXPLORER | |
| • | DOE PAGES | |
| • | DOGPILE | |
| • | DRUGBANK | |
| • | DS - DANSK STANDARD (DINAMARCA) | |
| • | DSM - DEPARTMENT OF STANDARDS MALAYSIA (MALASIA) | |
| • | DSPACE-MIT | |
| • | DUCKDUCKGO | |
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |