Artbreeder
Still the most tactile way to explore a latent space by hand, but as a straight image generator it has been overtaken. Use it to produce families of related characters, not finished artwork.
Pros
- Slider control over individual traits is genuinely different from prompt-only tools
- Paid entry is $8.99/month, cheap against most image suites
- Huge public library of images you can start from instead of a blank prompt
Cons
- Three credits a month makes the free tier a demo rather than a usable plan
- No API and no automation of any kind
- Realism trails current diffusion tools by a wide margin