If you're looking for an AI image generation service with a free tier that lets you generate as many images as you want, ImgGen is a great option. The service lets you generate high-resolution images based on text prompts without having to sign up or add a watermark. It also comes with a range of photo editing tools, so it's good for creative projects and commercial use.
Another option is Playform, a no-code AI art generation service that offers unlimited free image generation. Playform offers a range of tools like FaceMix, Style Transfer and Sketch to Art so you can generate and edit images. The service prioritizes user ownership and privacy, so it's good for pros and amateurs.
Last, CGDream offers unlimited image generation on its free tier, though with some restrictions compared to its paid tier. The service lets you upload 3D models or images and apply AI-suggested filters to fine-tune results. It's good for creative and commercial use, and prioritizes content privacy and security.