ImageMagick is an all-in-one freeware graphics software suite for creating, editing, composing, or converting images in Windows, Linux, and Mac.

XnView Full is a powerful tool that enables users to view, process, and convert image files easily. XnView Full has all plug-ins and languages included. XnView Standard has just a few add-ons included.

XnView Standard is designed to quickly and easily view, process, and convert your image files. All languages and a few add-ons are included.

NPS Image Editor is a lightweight, multi-layer Windows image editing app perfect for pixel art, drawing, and photo editing.

Blockbench provides you with an Open Source model editor for low-poly and boxy models with pixel art textures.

PicPick is an all-in-one screen capture tool that includes an intuitive image editor, color picker, color palette, pixel ruler, protractor, crosshair, whiteboard and more.

Krita Studio is an Open Source, powerful, all-in-one painting application geared for professional artists, VFX, and game studios.

GIMP Portable is the full-featured image and photo editor bundled with a PortableApps.com launcher as a portable app so that you can edit your photos and images on the go. The latest installer is available for download here.

cPicture is a modern all-in-one software suite to support your digital picture workflow. Very easy and without a database or installation.

ibis Paint offers a wide range of advanced features designed to enhance your digital art creation experience, making it easier to produce stunning artwork.

Imagine is a free image-animation viewer developed as an alternative to many other free popular viewers such as IrfanView, XnView, or FastStone Image Viewer.

Affinity by Canva seamlessly integrates the capabilities of Affinity Photo, Designer, and Publisher into a single, powerful, and free application.

FireAlpaca is a free paint app with simple tools and controls that let you draw an illustration quickly.

Sparkbooth is a very full-featured photobooth software capable of using webcams or DSLR cameras.

G'MIC is an open and full-featured framework for image processing in Gimp, Paint.Net, and Krita.

ImageGlass is an Open Source portable image viewer that supports many image formats and is loaded with great features.

darktable is an Open Source photography workflow application and raw developer intended to be a virtual light table and darkroom for photographers. Portable version is also available.

Inkrease is a unique program thoughtfully crafted to provide an enjoyable painting experience that helps individuals relax and unwind. It encourages users to paint figures, providing an opportunity to reduce stress and anxiety while enhancing focus and creative thinking. A portable version is also available.

Chasys Photo (formerly Chasys Draw IES) is a suite of image editing applications, including a layer-based image editor with animation and more.

Photoflare is an Open Source quick, simple, and powerful 64-bit image editor designed to be a ground-up improvement of PhotoFilter.

DeepSkyStacker is geared toward astrophotographers and provides a simplified option for pre-processing images.

Alternate PicView is a user-friendly freeware program designed for viewing and manipulating images.

Artweaver Free lets you paint creatively with the help of a vast range of painting tools so you can create sketches from photos or experiment with colors.

Darktable Portable is a photography workflow application and raw developer that aims to provide photographers with a virtual light table and darkroom. Also available for Linux/Mac as well as an installer version.

Sony Catalyst Browse gives you a robust clip management tool designed to replace Content Browser and RAW Viewer.