Related software

Species Distribution Modeling
You can try the very popular maxent. It is very easy to use with DIVA. Or have a look at niche player Biomapper for ENFA habitat suitability, and good old GARP.

Conservation planning
With C-Plan you can calculate the relative contribution (Irreplaceability and other measures) of land areas (sites) towards a predefined conservation goal

The competition: Free GIS programs

Other Links

Software for Biological Collection Management

Managing genetic resources with GIS; (from IPGRI/Americas)

Learn more about GIS 

Do you find it difficult to get the right colors for your map?

Society for Conservation GIS