ROD HAGEN This is a simply brilliant piece of software for anyone who wants to plot spacial data in a simple and effective manner.
It has found great favour with people working with biological data, but my own use is a bit different. I use it to map human geneaological information.Whether you simply want to plot a map of your family history, or deal with a large data set for professional purposes, this is a great place to start.
The newfound ability to use Mapinfo .e00 export files is simply fantastic. Its probably the simplest way of reading GIS data available for Macs. iMap 2 was great, but iMap3 opens a whole new set of possibilities.