What are some alternatives?
When comparing JS Paint and KiddoPaint, you can also consider the following products
Microsoft Paint - Paint (formerly Paintbrush) is a simple, ultra-basic graphics painting program that is included...
GIF Paint - Like MSPaint… for GIFs.
More Moji in Slack - You don't have enough emojis in Slack.
Emoji Brush - Draw with emoji
Paint.NET - Paint.NET is a free image and photo editing software.
Cult of the Party Parrot - Add dozens of Party Parrot emojis to Slack