Links
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
qGIS, GRASS.
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