need GIS software for Macs

[PlantEcoLab]

I'm looking for a simple GIS package/shareware/freeware for Macs. This
would be used to overlay different types ecological data including forest
stand maps, species composition etc. Please e-mail me directly and I can
summarize any responses if there is interest in doing this. Thanks in
advance.

Best regards,

Duane Peltzer

Peltzer at meena.cc.uregina.ca