Draw.Chat - Anonymous real-time whiteboard with text and video chat.
Off Of - A Simple Percentage Calculator for iOS
Butter - Butter is a newly launched chatting application that focuses more on the privacy of its users.
Skype - Stay in touch with your family and friends for free on Skype. Download Skype today to chat and call on desktop and mobile.
Allo.io - Whiteboarding, documentation, and video chat in one place.
Figma - Team-based interface design, Figma lets you collaborate on designs in real time.