Another good option is Stablecog, a free, open-source AI image generator. Stablecog uses Stable Diffusion and Kandinsky models to generate art from text prompts or from existing images. The site has a gallery to browse AI-generated images with metadata and a variety of pricing plans to suit different needs. It's good for artists, designers and anyone else who wants to experiment with AI-generated art, and it's got detailed guides and API documentation for more serious use.
Leonardo is another option. It's got a lot of features, including image generation, AI Canvas for editing, and 3D texture generation. It's geared for lots of creative uses, but it's also got a free tier and paid subscriptions for higher token limits and premium features, so it's a good option for people who want to boost their creative abilities. More than 4 million people have used it, so it's a good option for creators.
If you want more control over the process, FollowFox is an AI-powered art generator from text prompts. It's got more than 25 parameters to control image generation, so you can steer the process more. It's good for brainstorming ideas, creating promotional materials and creating your own characters, and it offers 10 free daily image generations, so it's a good starting point for creative exploration.