This website might help: http://www.smarthomedb.com/
Very little info there, unless I missed it somehow.
Quick look into 'hubs' and seems like main options are Vera, SmartThings, and openHAB. Wink now bankrupt? But also missing local control (needs internet connection). Hometroller higher end option. Annoying Zwave frequencies are also different for NZ/AU vs other regions - further complicating things.