If you're looking for a FollowFox alternative, DeepMake is definitely worth a look. It's an open-source generative AI content creation system that lets you generate images and videos, edit existing content and automate editing tasks without relying on cloud computing or paying for usage. It runs on your own PC, so you have full control over the creative process.
Another good alternative is ZMO, which has a range of AI tools for generating and editing imagery. That includes an AI anime generator, an AI photo generator for photorealistic portraits, an AI photo editor and more. ZMO is highly customizable and easy to use, so it's good for pros and amateurs, and there are free and premium versions.
If you're interested in photorealistic images and avatars, Lucidpic is worth a look. It lets you generate photorealistic avatars from a single photo and control every aspect of the image. It's good for marketing, stock photography, games and social media content, and there's a free tier and subscription plans for different needs.
Last, Stablecog is a free, multilingual, open-source AI image generator based on Stable Diffusion and Kandinsky models. It's fast at generating images, has lots of options for customizing them, and commercial use is permitted for paid accounts. It's geared for artists and designers, with detailed documentation on how to use it and an API for programmatic image generation.