Edchat Interactive offers online professional learning opportunities via live video discussions. Sessions include a five- to 10-minute presentation on a concept, after which participants break into small video-chat groups for discussion. The small groups then present their findings to all participants.
Wordnik has the look and feel of a traditional dictionary with a twist. Along with the definition of a word, students see images related to the word, hear related sounds, and even see tweets with the target word highlighted.
Unhangout is an open-source platform for running large-scale online unconferences. The project uses Google Hangouts to create as many small sessions as needed and help users find others with shared interests.