Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Siberian CMS - Siberian is an Open-Source and Free App Maker. Unlimited Push Notifications. Unlimited features. Fully Customizable. Download it and build your own app now!
HelpScout - Help Scout is a simple, straightforward way to provide excellent support
Dropsource - Mobile development platform for building native iOS & Android apps
GoSquared Live Chat - Beautiful, simple, and free live chat for your website
GoodBarber - GoodBarber is a mobile app creation platform.