Duotone
Duotone focuses on two-tone treatment for photos.
What it does
Duotone turns an uploaded or selected image into a two-color treatment.
When to use it
To unify article thumbnails, apply the same two-color treatment across sources.
Visit Duotone official site
BGJar
BGJar focuses on editable SVG background graphics.
Blobmaker
Blobmaker focuses on organic blob shapes as SVG.
Dither It!
Dither It! focuses on dithered pixel-style image treatment.