Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Shopify Ping - Chat with customers & get help with marketing in one app
Carrd - Simple, responsive one-page site creator.
ChatPirate - Offer help and capture leads with a truly simple live chat.
mmm.page - Dead simple, drag & drop personal websites
Drift - A messaging app that helps you grow your business.