Webkit is an open source browser engine used to layout and render webpages. Many modern browsers like Safari, Chrome uses this engine. Webkit is very easy to port on embedded or handheld device, so it is widely used by major smartphones and tablets. I am compiling the list of such Smart phones and tablets which I know uses the Webkit as their main browser engine. Please let me know if you know other such handhelds uses the Webkit, I will add it to list.