What are some alternatives?
Microsoft Paint - Paint (formerly Paintbrush) is a simple, ultra-basic graphics painting program that is included...
Tux Paint - Tux Paint is a free, award-winning drawing program for children ages 3 to 12 (for example, preschool and K-6).
KiddoPaint - MS Paint in your browser (with emojis 💃😽🎨)
MyPaint - MyPaint is a fast, distraction-free, and easy painting tool for digital artists.
More Moji in Slack - You don't have enough emojis in Slack.
Paint.NET - Paint.NET is a free image and photo editing software.