| Name | Abbreviation | Description |
| Arkivalieronline | SA or AO | View original protocols and documents on Arkivalieronline. 'Arkivalier' meaning old documents, cases and protocols. Arkivalieronline contains over 18 millioner individual pictures. |
| Dansk Demografisk Database | DDA or DDD | Search through censuses, church records, probate and other sources. |
| DIS Danmark | DIS | DIS-Danmarks formål er at skabe et forum for databehandling i slægts-, personal- og lokalhistorie. |
| Family Search | FS | American FamilySearch have millions searchable data, and own copies of some of the Danish church records. Their copies are often of better quality than those from SA / AO. |
| Politiets Registerblade | Do you have relatives who have lived in Copenhagen between 1890 and 1923? Then you have a good chance of finding them in 'Polititiets registerblad'. At the time the police would have the same role as today's National Register. |
| Danskeaner.dk | Danskeaner.dk - An integrated search database and genealogy program for the discerning genealogist. |
| Wadschier.dk | Wadschier.dk - Genealogy and digitized sources. Wadschier.dk is the exchange of genealogy, here you will find many photographed records not found in SA / AO |
| Slægtens Historie | Always here to help you find your family history. |
| dk-gravsten.dk | dk-gravsten.dk - a project that aims to preserve the old gravestones for posterity as part of the national heritage. Links to photographed cemeteries in Denmark as an aid to genealogists. |
| Slægtsforskning | Group discussion and exchange regarding family history and genealogy. |
| Scandinavian Genealogical Research | International group for discussion and exchange regarding Scandinavian genealogy. |