Device assistants are generally needed when you want a device that has to be connected and interact with your PC. These generally imply a software solution provided by the device manufacturer, like Nokia or Dell.
Genius,KYE Systems Corp
XOX Electronics Co.,Ltd.
SunEyes group Co., Ltd.
Spline Network, Inc
ZhangDuo Corporation International
MITSUBISHI ELECTRIC CORPORATION
Shenzhen Foscam Intelligent Technology Limited
GIS Section, Minnesota Department of Natural Resources