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
Whisper.sh - Whisper is the best place to express yourself online. Connect with likeminded individuals and discover the unseen world around you.
GoSquared Live Chat - Beautiful, simple, and free live chat for your website
YouHue - A fun new way to ask "How are you?"