There are several free AI image editors that you can use to enhance or manipulate images. Here are some popular options:
1. **GIMP (GNU Image Manipulation Program)**: While not an AI tool by itself, GIMP can be enhanced with plugins and scripts to provide various effects and styles. It’s a powerful, open-source alternative to Photoshop.
2. **DeepArt**: This is an online service that uses neural networks to transform photos into artworks


