PhotoCraft is a free, Open Source image editor that is built as a clean-room reimplementation and alternative to Adobe Photoshop. This image editing tool offers an impressive array of features, including layers, masks, adjustment layers, layer styles, vectors, brushes, and support for real PSD files.

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

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

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

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

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

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

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.

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

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

Sweet Home 3D helps you draw the plan of your new or existing home, arrange furniture on it, and even see the results in 3D.

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

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.

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

LibreCAD is an Open Source 2D CAD (computer-aided drafting) application that provides an easy-to-use graphics suite for all major operating systems. LibreCAD portable is also available.

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.

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

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

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

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

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.

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.

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.