Image Editors

Upscayl
Free
Free and Open Source AI Image Upscaler.
Paint.NET
Free
A free image and photo editing software for PCs.
GIMP
Free (Open Source)
Create and alter photos and graphics manually or via scripting.
Darktable
Free
An open source photography workflow application and raw developer.
Pinta
Free (Open Source)
A free, open source program for drawing and image editing.
Picosmos Tools
Free
Integrates viewer, editor, effect, batch, combine and split functions into one set.
Fotosizer
Free
Resize hundreds of photos in a matter of minutes in a quick and easy way.
Chasys Draw IES
Free
A suite of applications including a layer-based image editor with animation, vista-style icon support and super-resolution via image stacking, a multi-threaded image file converter and a fast image viewer.
CameraBag
Free Trial
Brings a fresh new approach to photo editing.
Caesium Image Compressor
Free
Compress your pictures up to 90% without visible quality loss.
Photoline
Free Trial
A professional image editor which offers creatives a mostly non-destructive workflow.
Image Tuner
Free Trial
A compact and efficient tool for mass image resizing, renaming and conversion.
RawTherapee
Free
A free RAW converter and digital photo processing software.
Machinery HDR Effects
Free Trial
Generates fantastic effects and is unbelievably easy to use!
RIOT
Free
A free image optimizer that will let you to visually adjust compression parameters while keeping minimum filesize.
Light Image Resizer
Free
Right click to easily resize pictures.
FreeVimager
Free
A Free & Fast Image Viewer and Editor for Windows.
Logoist
Free Trial
Full Featured Graphics Design App for Mac, iPad and iPhone.
ImageMagick
Free
A software suite to create, edit, compose, or convert bitmap images.
Hugin
Free
Panorama photo stitcher.