What are some alternatives?
When comparing JS Paint and GIF Paint, you can also consider the following products
Microsoft Paint - Paint (formerly Paintbrush) is a simple, ultra-basic graphics painting program that is included...
KiddoPaint - MS Paint in your browser (with emojis 💃😽🎨)
My Slack Emoji - Turn your team photos into Slack emoji's
More Moji in Slack - You don't have enough emojis in Slack.
Megamoji - Paint emojis in Slack (and elsewhere) 😊🎨✨
Paint.NET - Paint.NET is a free image and photo editing software.