On-line catalogue, with facilities for search, adding records, map, statistics, articles and references.

Shareware / freeware software for design and planning of the most popular dials.

An essay on the use of sundials in gardens.

Heiner Thiessen designs Sundials that can tell the time of Ssunrise and Sunset and tell the angle of Solar declination and even the time at night. This site shows how they work.