I don't often consider sticky notes innovative, but I'll make an exception for UX Stickynotes. UX Stickynotes are massive sticky notes designed to look like web browsers and smartphone screens. The notes have a sticky back (hence the name) which makes them easier to post up and display on idea boards.
These virtual-designer sticky notes were created by Ali Zaman, a designer who grew frustrated with having to tape up his design sketches. Zaman has done a great service to all of the web and app developers out there who prefer to jot down their visions before they put them on the computer. UX Stickynotes come in packs of one, three and five and sell for $6.50, $19 and $27 respectively.