Froged - One click solution providing easy-to-use marketing, sales and support services to turn website visitors into happy customers.

Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.

Keep Your Friends Close - A free e-book about maximizing Customer Lifetime Value

ChatWoot - Open-source omnichannel customer engagement platform

Intercom on Customer Engagement - A book on how to create messages that drive engagement

tawk.to - tawk.to is a free live chat app that lets you monitor and chat with visitors on your website or from a free customizable page