Drawasaurus - Drawasaurus is an online drawing & guessing game you can play with friends or strangers.
LetsDraw.It - Guess and Draw, Drawing Battle, Pictionary, Copy picture - online drawing games where you can compare your skill with others.
Excalidraw - Excalidraw is a whiteboard tool that lets you easily sketch diagrams that have a hand-drawn feel to them.
Drawception - The browser-based party game that combines the telephone game with drawing! Hilarity ensues.
Draw Something - The most popular social drawing and guessing game in the App Store with over 7 billion drawings created!
Drawisland - This website is an online drawing tool where you can create nice draws and animate images too.