Voki is a free online tool that allows users to create customized avatars, add voice recordings to the avatars, and share the voiced avatars on blogs, websites and profiles. It has additional educational resources and tools. Users can create accounts, design avatars, and share their avatars with others as a creative way to present information in an engaging manner. While similar tools exist, Voki offers more customization options and the ability to add voice compared to alternatives like Doppel Me.