EstimateS - available from Dr. Rob Colwell of the University of Connecticut

Ecological Methods by Southwood and Henderson is available online from Columbia University through NetLibrary. Click on the link, log into the system through CU libraries, if you are off campus enter your CU user name (email address and password), then search for "Ecological Methods", and read the book online.

Download the freely available Biodiversity Calculator (1 MB) written by James Danoff-Burg and Chengyuan Xu here. Although not essential, Magurran (1988) Ecological Diversity and Its Measurement is a useful tool to help interpret your results. It is possible to automatically determine whether your community adheres to the Geometric, Log, Log Normal, or Broken Stick Models using this program. It will also automatically conduct most Information Statistic diversity analyses and most Dominance diversity analyses - including the Shannon, Brillouin, Simpson, McIntosh, Berger-Parker, and the Q statistic. The Worked Examples at the back of the book should be used as the  explanation or instructions as to how to use the file to conduct the analyses. The file is also available as a zipped file in a smaller size (204 kb). If you publish results based on this calculator, please acknowledge authorship in the publication.

A good website for determining Chi Square significance and another useful for determining the amount of the Log Normal curve below a certain z value ( and another , and another ).

Some useful websites discussing community ordination:

EPA - Multivariate Methods
EPA Statistical Primer - PCA
EPA Statistical Primer - Canonical Correlation
EPA Statistical Primer - Cluster Analysis
The Ordination Web Page from University of Oklahoma
Ordination Glossary from University of Oklahoma