Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
SmoochBot - Open source on-boarding bot for conversational apps
Aboardly - IFTTT for automated customer emailing
Hotline - In-app chat,real-time engagement & self-service for your app
Twixor - Customer communications made interactive and dynamic!
Message Me - Website to create your contact business card