ILLUSTRATING TIME'S SHADOW
focusing on education and interesting practical aspects of sundial design
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SHADOWS
Free, as well as a paid for version with extra features. Good graphical
depiction. NOTE: Even though you enter a longitude, it will ignore it
unless you tell it to consider longitude. Animated gnomon shadows.
Comprehensive, license is reasonable and free version covers many
common needs , can upgrade to more features
ZW2000
Free. very popular. Includes graphical layouts of advanced features at
no cost.
Sundi
Free, popular..