Playground AI - Stable diffusion level generation with 1000 free pics a day
Stable Diffusion XL - Richer images & jaw-dropping aesthetics from shorter prompts
InvokeAI - A Stable Diffusion toolkit.
Artimator - With Artimator FREE AI Image Generator you can generate unique artworks from a text description in various styles using different AI technologies like Stable Diffusion 1.5, Stable Diffusion XL (SDXL), and Leonardo Diffusion.
Midjourney - Midjourney lets you create images (paintings, digital art, logos and much more) simply by writing a prompt.
Prompts - Build a better writing habit