getimg.ai is a full-featured platform with a variety of tools for generating new imagery and editing existing imagery. Its tools include an AI Generator, Image Editor, AI Canvas and DreamBooth for training your own AI models. It can generate high-resolution images and comes with a variety of community-trained AI models, so it's good for many creative tasks.
Another option is ChatDesigner, which uses a chat interface to try to make image creation and editing as simple as asking a question. It's got tools like text-to-image generation, image-to-image generation, style transfer and background replacement. Its interface is designed to be easy to use for people with no experience, but it's also good for pros like designers, marketers and photographers.
If you need to generate and edit images collaboratively, Facet generates and edits images in real time with controllable image elements and advanced prompting. It's geared for creative pros who want to speed up their work while still having control over the output. Facet's browser-based service is easy to use, and it offers a variety of pricing tiers for different needs.