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

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

Seamless3d is Open Source 3D modeling software for any type of artist wanting to create 3D animation.

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.

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

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

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

Pinta is a free, Open Source drawing/editing program modeled after Paint.NET. Its goal is to provide users with a simple yet powerful way to draw and manipulate images on Linux, Mac, and Windows.

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

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

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.

Drawpile is a sketching oriented drawing program with a twist: you can share your drawing live with other users.

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

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.

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

Paint.NET is a free image and photo editing software that features an intuitive and innovative user interface.

Image Tuner is a program for batch resizing, converting, watermarking, and renaming your digital photos/images from/to JPEG, BMP, PNG, TIFF, and GIF formats.

GraphicsMagick is a fork of ImageMagick that emphasizes on stability of both programming API and command-line options.

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

VOVSOFT 3D Box Maker can help you design, view, and export 3D custom box covers for use in many different situations.

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.

AndreaMosaic is used to create stunning mosaic digital art using any images that you choose.

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

digiKam is an Open Source (free) app designed to provide professional photo management for everyone.

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