beta.openai.com/playground/
You can ask this tool to write anything for you. For an example if you ask "write an email asking for more money" it will write a whole email for you.
makemydrivefun.com
Write your road trip information, for example if you enter Los Angeles to Seattle, it will show you the road you can take and fun places you can stop along.
sketch.metademolab.com
Just upload the picture of your drawing and the tool will animate your drawing in seconds. So let your drawing have some moves!
inkscape.org
It's free alternative of Adobe Illustrator. You will find the same tools and function for which you have to pay in Adobe Illustrator.
Summary
1. beta.openai.com/playground/ 2. craiyon.com 3. makemydrivefun.com 4. sketch.metademolab.com 5. inkscape.org