Follow the links below for a general introduction to Z-Wave technology and its advantages:

The Z-Wave Alliance website
The public Z-Wave specification documents

Browse through a large number of available certified Z-Wave devices in the Z-Wave Alliance product catalogue:

z-wave.com

Access the Z-Wave Technical Support page for a wealth of information and resources about Z-Wave technology:

silabs.com/wireless/z-wave

Follow the link for more details on how the certification process is initiated and how it is processed at MK Logic.