In addition to letting users dedicate different tasks to different screens, Mr Martynov suggested users might want to display important information such as an airline boarding pass or a map on the e-ink screen to take advantage of the fact that the technology only uses power to refresh - and not maintain - its image.

BBC: Yota smartphone

Okolloh, 31, created the site using Ushahidi, a free piece of software that quickly creates Web sites to which eyewitnesses of war and crisis in out-of-reach places can send news by e-mail or text and have it attached to a Google map.

FORBES: Magazine Article

An address on an e-mail, for example, can appear over the text as a map with a move of the computer mouse.

FORBES: The Business Mash