Robinhood - Free stock trading service.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Sumday - Investing how you least expect it
Service - Customer service issues solved for you, on demand, for free.
Matador - Free investing + Social feed of trades + 2.5% on your cash
LiveMessage from Salesforce - Make mobile messaging a cornerstone of customer service