AnySoftKeyboard - Android (f/w 1.5+) on-screen keyboard for multiple languages.
Explain Everything - Explain Everything is an easy-to-use design, screencasting, and interactive whiteboard tool that...
Gboard - Google-powered keyboard with search, GIFs, emojis and more!
Microsoft Whiteboard - The canvas where ideas, content, & people come together.
Hacker's Keyboard - Are you missing the key layout you're used to from your computer when using an Android device?
Conceptboard - Instant Whiteboards for Teams & Projects