Elvire

add glitch to JPG image

http://snorpey.github.io/jpg-glitch/

fluid paint

http://david.li/paint

visual grid editor

http://eskimoblood.github.io/gerstnerizer/

a tool to visualize dimensions of a variable font

https://fvar.unsoundscapes.com/

online semi-automatic vector drawing app

http://loopalo.com/

No-code triangle pattern generator

https://trianglify.io/