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Southeastern Native Americans
This index has links to resources at Sacred-texts about the religion, mythology, folklore and spiritual practices of Native Americans of the Southeastern region, including the Cherokee and Creek.
The Cherokee have their own index.
Myths and Tales of the Southeastern Indians
by John R. Swanton. 
(Bureau of American Ethnology Bulletin, No. 88.)
A scholarly collection of Southeastern folklore.
When the Storm God Rides: Tejas and other Indian Legends
by Florence Stratton, collected by Bessie M. Reid, Illustrations by Berniece Burrough. 
Tales of the Texan Native Americans.