Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Stealthy: Secret Messenger - Chat anonymously with friends & strangers
Live Chat by Sumo.com - Instantly communicate with customers, prospects & visitors
Bubi Chat - Location based anonymous chatting app
GoSquared Live Chat - Beautiful, simple, and free live chat for your website
Roundio - Explore what people posted to Instagram or Flickr near you