miniPaint - Online graphics editing tool use HTML5 technologies like Canvas, Offline support, Drag and Drop.
KiddoPaint - MS Paint in your browser (with emojis 💃😽🎨)
JugiPaint - JugiPaint is a painting software with diverse tools for various types of illustration work.
JS Paint - JSPaint is a web-based Microsoft Paint remake
RealWorld Paint - RealWorld Paint is an free portable image/photo/animation editor.
JS Canvas - Classic MS-Paint redone as a web application