Bamboo Ink: Smart stylus optimized for Windows Ink
Wacom Bamboo Stylus duo review: Wacom Bamboo Stylus duo - CNET
Amazon.com: Wacom Bamboo Duo 2-In-1 Stylus with Pen for Kindle, Apple iPad, iPhone, iPod touch, Android and other Capacitive Touch Surfaces (CS150W) : Cell Phones & Accessories