Consistent Character AI
A tool for creating character images with the ability to edit expressions, poses, head position, and more. Currently in beta. No free plan, but this has a lot more options than most similar tools.
AI Consistent Character Creator: Poses, Faces & Headshots
Another character image generator
MagicQuill
MagicQuill is an online image editing tool focused on AI inpainting of existing images. Upload and image and draw the shape of what you want to add or change in the image. The tool guesses what you want and generates a text prompt for you. If it guesses right, you can run it and generate the edited image. If it guesses wrong, you can tweak the prompt. Open source tool with a CC license; you can get the source code and run it on your own server if you want.
StoryArtAI - AI Kid Stories Art Generator
StoryArtAI is an AI image generator designed specifically for creating illustrations for children's books. This probably isn't the most useful tool for workplace training or adult learners, but it might be useful for K12 educators. The tool includes support for creating consistent characters and detailed prompting tips.
Img2Go.com - Online photo editor and image converter
Multiple image generation and editing tools powered by AI. Upscaling, background removing, face blurring (automatically detecting all the faces in a crowd and blurring them all for privacy), inpainting, image comparison. This site has some basic image editing tools like cropping, rotating, and compressing as well. The basic plan is free, with paid plans for credits for more advanced tools.