Merucav

A modern digital design tool offering several customizable shaders, the ability to add shapes, text, and SVG icons to the canvas, as well as blur the canvas and add noise to it.

SourceForge page: https://sourceforge.net/projects/merucav/

The app is fully localized into 15 languages.

By the way, here are some configs for you to play with: https://pastebin.com/xVGmN1CS https://pastebin.com/C7nD5KvV https://pastebin.com/UUqumybK (Export & Config -> Import -> Apply)