VoiceThread is an online tool that allows users to add comments such as audio, text, or video to images, documents, and videos uploaded by others. It can be used for book talks, tutorials, presentations, online conversations, and collaborative class projects. Creating a VoiceThread is easy - users simply upload files, add titles, and then comment on the files. VoiceThreads can be shared by linking, embedding, or making them public on the VoiceThread website. The tool has benefits over other podcast tools like allowing graphics and comments to be easily added and changed.