SpatialEcology.Com
Spatial ecology is the study of the interrelationship between organisms and their environment, with particular emphasis on the spatial nature of these interactions. Spatial analysis commonly requires the use of large, complex databases using software that is not specifically designed for ecological applications. The purpose of this site is to help bridge the gap between software, data, and the sophisticated spatial analyses that are needed in modern ecological research.

Hawth's Analysis Tools for ArcGIS
Hawth's Tools is a FREE extension for ArcGIS (ArcMap) that performs a number of spatial analyses and functions that cannot be conveniently accomplished with out-of-the-box ArcGIS. Most of the tools are written with ecological analyses in mind, though many will be useful to any GIS user. Visit the Hawths Tools page for further information, or to download the extension.

Articles
A series of articles discussing approaches to programming spatial analyses, and how advances in computing and spatial technologies are influencing the way ecologists answer questions. Includes programming tips, code samples, ArcObjects help, and theoretical discussions.