VoiceThread is a photo- and video-sharing tool. It lets users upload photos , videos and documents from their hard drive or other online services, and add voice, text, and video annotations to each slide. These 'VoiceBooks' can be embedded in blogs, Web sites, or social networking profiles. Other users can comment on each slide, draw doodles, or leave voice messages of their own.
In addition to the standard methods of adding voice comments to a photo, one thing that makes VoiceThread especially cool is the telephone integration, which lets you record messages using a standard landline or mobile phone.
Winner: VoiceThread (VoiceThread.com)