Intercom - Intercom is a customer relationship management and messaging tool for web businesses. Build relationships with users to create loyal customers.
Live Center - Live Center helps news and media companies cover events and breaking news in live feeds. Create Live Blogs with engaging content, interact with your audience, and customize feeds to strengthen your brand.
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
Medium - Welcome to Medium, a place to read, write, and interact with the stories that matter most to you.
Zendesk - Zendesk is a beautiful, lightweight help-desk solution.
Tumblr - A feature rich and free blog hosting platform offering professional and fully customizable templates, bookmarklets, photos, mobile apps, and social network integration.