Draw.Chat - Anonymous real-time whiteboard with text and video chat.

UpNote - A beautiful and clean cross-platform app for notes organizer

Butter - Butter is a newly launched chatting application that focuses more on the privacy of its users.

Notesnook - Notesnook is a simple and private note taking app that keeps your notes organized and synced on your phone, tablet and computer.

Allo.io - Whiteboarding, documentation, and video chat in one place.

Note Board - Productivity app. Save information like a sticky notes.