There are several alternatives to Adobe Photoshop, each offering its own unique features and advantages. Here are some popular ones:

1. GIMP (GNU Image Manipulation Program): GIMP is a free and open-source image editor that offers many of the same features as Photoshop, including layers, masks, filters, and customizable brushes. It's available for Windows, macOS, and Linux.
2. Krita: Krita is a professional-grade painting program that is also suitable for image editing and manipulation. It's known for its powerful brush engine and extensive support for digital painting techniques. Krita is free and open-source, and it's available for Windows, macOS, and Linux.
3. Affinity Photo: Affinity Photo is a powerful raster graphics editor that offers many of the same features as Photoshop, including advanced selection tools, adjustment layers, and retouching tools. It's available for a one-time purchase, making it a more affordable option for some users. Affinity Photo is available for Windows, macOS, and iPad.
4. Corel PaintShop Pro: PaintShop Pro is a comprehensive photo editing and graphic design software that offers a wide range of tools and features for both beginners and advanced users. It includes tools for photo retouching, graphic design, and batch processing. PaintShop Pro is available for Windows.
5. Pixlr: Pixlr is a web-based photo editor that offers a simple and intuitive interface along with a wide range of editing tools and effects. It's available in both free and paid versions, with the paid version offering additional features and capabilities.
6. Photoscape: Photoscape is a user-friendly photo editing software that offers basic editing tools as well as features for batch processing, collage making, and GIF creation. It's available for free and compatible with Windows and macOS.

These are just a few examples of Photoshop alternatives available in the market. Depending on your specific needs and preferences, you may find one of these alternatives to be a suitable replacement for Photoshop. It's a good idea to try out a few different options to see which one best fits your workflow.