skribbl - Word guessing based on drawing.
KiddoPaint - MS Paint in your browser (with emojis 💃😽🎨)
LetsDraw.It - Guess and Draw, Drawing Battle, Pictionary, Copy picture - online drawing games where you can compare your skill with others.
GIF Paint - Like MSPaint… for GIFs.
gartic.io - Draw, guess, and win!
JS Paint - JSPaint is a web-based Microsoft Paint remake