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
Evercontact - Your contacts always up to date and automatically with Evercontact.
Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
CONTACTBOX - CONTACTBOX combines the simplicity of an address book with effective functions of a CRM system.
LiveChat - LiveChat - premium live chat software. Approach customers directly on the website, make connections and drive more sales using LiveChat.
Bigin by Zoho CRM - Pipeline-centric CRM built and priced for small businesses