Midjourney - Midjourney lets you create images (paintings, digital art, logos and much more) simply by writing a prompt.
DALL-E - Creating images from text, from Open AI
Playground AI - Stable diffusion level generation with 1000 free pics a day
Stable Diffusion XL - Richer images & jaw-dropping aesthetics from shorter prompts
Stable Diffusion Online - Use Stable Diffusion online to generate images
ControlNet - ControlNet is a neural network structure to control diffusion models by adding extra conditions.