Image editing tools

CorePaint is a simple bitmap painting program to create very simple graphics. Free and open source program

XnRetro is a free and open source, multiplatform program for creating images with various effects

XnSketch is a free and open source program for turning photos into cartoon or sketch images

Oh My SVG is a free and open source software for convert unoptimize SVG files into smaller versions

YOGA Image Optimizer is a free and open source graphical tool for converting and optimizing images in JPEG, PNG and WebP format

Image Optimizer is a free and open source simple program for compressing images without loss of quality using JpegOptim and OptiPNG

Pixelitor is a free and open source, multi-platform advanced image editor with support for layers, filters, cropping and other functions

ImEditor is a free and open source, simple and versatile image editing program

Photoflare – free and open source, fast and simple, but powerful cross-platform image editor