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...
FlorisBoard - An open-source keyboard for Android.
Microsoft Whiteboard - The canvas where ideas, content, & people come together.
Gboard - Google-powered keyboard with search, GIFs, emojis and more!
Conceptboard - Instant Whiteboards for Teams & Projects