Roundio - Explore what people posted to Instagram or Flickr near you
Spectrum - Browser-based app to visualize the frequencies of an audio file.
Circle.so - Bring together your discussions, memberships, and content. Integrate a thriving community wherever your audience is, all under your own brand.
Treadie - Create your own micro-social network for topics
MushRoom - KnockKnock the person whom you want to message and he/she should accept your knockRoom or Group can be created by providing a nameShare Room link with your friends to join the conversationWatch video or listen music during conversation
Roomvine - Chatrooms for real life venues, neighborhoods and events