HubSpot Conversations
Intercom
Chatlio
Chatra
Crisp Chat
Battlecard
Drift for Slack
Chaport Live Chat
Passport by Mailjet
MJML
Email Design System for Sketch
HTMLEmail.io
Getform
Stamplia
Really Good Emails
MailDeveloper
HubSpot Conversations Passport by MailjetIntercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
MJML - The open source framework for responsive emails
Chatlio - When you have a business to run, your average instant messaging software just will not do. You need an internal presence upon which your entire team can collaborate on. Read more about Chatlio.
Email Design System for Sketch - Sketch file with 10 email templates for designers
Chatra - Live chat software that helps to increase revenue and collect feedback providing an easy way for website owners to talk to visitors in real time.
HTMLEmail.io - Responsive HTML email templates for startups & developers