GIMP is described as 'Free open-source suite with advanced photo retouching, composition, batch processing, plugin extensibility, custom scripting, and wide file format compatibility' and is a leading digital painting tool in the photos & graphics category. There are more than 100 alternatives to GIMP for a variety of platforms, including Windows, Mac, Web-based, iPhone and Android apps. The best GIMP alternative is Krita, which is both free and Open Source. Other great apps like GIMP are Paint.NET, Adobe Photoshop, Affinity and Photopea.
Bazaart® is an award winning photo collage and design app. It allows you to create masterpieces on the go, and seamlessly work with Adobe Creative Cloud. Bazaart is available on iOS and Android devices.
Fhotoroom HDR is an easy to use powerful image editor that can take your JPEG's, Digital Camera RAW and High Dynamic Range photos and help you fix exposure, color, and distortion problems or quickly and easily make your photos stunning.
Artweaver is a simple Freeware program for creative painting, i.e. Artweaver offers you all artistic effects which you need for your work.
WidsMob Retoucher is an excellent photo retouching program, which is able to reduce image noise, portrait retoucher, film pack, adjust effects, fish eye effects, vignetting and more other features to photos with ease.
Pixelot provides an easy method for blurring or censoring regions of a photo with pixels. Use this app to hide faces, license plates, names & addresses, etc. Then share your picture on Google+, Facebook, Twitter, email, and more*.
We believe artists deserve the best possible tools and we are determined to give it to them. The goal with Leonardo is to make the best painting application ever.
PhotoPad picture editor is the fastest and most fun way to edit your digital photos. PhotoPad is one of the most stable, easy-to-use, and comprehensive photo editors available.
*** This is the LEGACY version. ARTSTUDIO PRO, the successor to this app, is available now with many new features and improvements. Find it by searching for “Artstudio Pro” on the Mac/iOS App Store.
Project Dogwaffle lets you be creative without the fear of messing up your clothes. No sudden spills, no funny fumes. You can paint, erase it, and try again, and again, and again......
Gimel Studio is a non-destructive, 2D image editor focused on simplicity, speed, elegance and usability.
GraphicConverter is computer software that displays and edits Raster graphics files. It also converts files between different formats.
Photoflare is a cross-platform image editor with an aim to balance between powerful features and a very friendly graphical user interface. It suits a wide variety of different tasks and users who value a more nimble workflow.
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Constantly (but not annoyingly) updated. Tools beyond my needs. “Free” to try full version. Great conversion tools, all formats. Good for MAC. Used for years without any problems.