Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Promoter - The Most Effective Way To Engage And Learn From Customers
Intercom Facebook integration - Read, manage & respond to Facebook messages from Intercom
Open Loyalty for Startups - Open source stack for building customer focused products
Crypton.sh - SMS - Secure Anonymous SMS in the cloud (and a phone number)
HelpCrunch - HelpCrunch Live Chat: Turn prospects into customers, drive sales and improve retention with a rich toolbox combining modern live chat, in-app messenger, email marketing, CRM and marketing automation.