Ember's ZigBee wireless networking systems - chips, software and tools - enable Energy Technologies - enertech - help consumers, businesses and utilities to better manage energy resources, save cost and preserve the environment.
Ember - Wireless Semiconductor Solutions
Ember offers the industry's most advanced, complete and integrated ZigBee system - including chips, software and tools.
EM35x System-on-Chip (SoC)
The EM351 and EM357 SoCs are tightly integrated with EmberZNet PRO, a ZigBee compliant mesh networking software which is the most deployed ZigBee platform in the market..
(This post has been corrected 2012, Ember appears to be part of Silicon Labs.)