Schleswig-Holsteinische Familienforschung e. V. promotes the study of genealogy and heraldry. Site includes articles in their publications. Copies of the publication are available in the Family History Library in Salt Lake City.
http://www.dcbib.dk/slesvigske-samling. Central library for southern Schleswig. Catalog of books, manuscripts, biographies, etc.
Local History Societies:
Heimatgemeinschaft-eckernfoerde.de This site includes a key word search for articles in the Yearbook.
Wiborg Priest History: Priest History
History of Schleswig-Holstein from A-Z
Emigration indexes for various areas in Schleswig-Holstein can be found at this link.
Card index to 25,000 surnames appearing in various archives in Schleswig-Holstein compiled in Kiel. German Project
Nordfriesland Databank: http://www.nordfriesland-datenbank.de/orte.html
Daily Life in Denmark: Online books