Free Photo Editing Software
Ghost
Ghost is a free and open-source headless CMS and blogging platform developed by Ghost Foundation. With Ghost you can manage content in style, the user experience provided by the software is intuitive and encourages writing. Ghost is written in JavaScript for the Node.js platform and is released under the MIT license.
OpenToonz
OpenToonz is a free and open-source, 2D animation product software published by DWANGO. OpenToonz is based on the source code of Toons by Studio Ghibli and features sequence number scanning can be conducted efficiently according to in between animation numbers. Four types of scanning (black & white, colored, with or without binarization). Scan settings that can be saved and reproduced. All while being compatible with the TWAIN standards.
Photo Raster
The Photo Raster is online photo editor with advanced features for photo editing and painting.
nomacs
nomacs is a free, open source, cross-platform image viewer. With nomacs you can easily view and manage all common file formats including jpg, png, tif, bmp, raw and many more. The sleek user interface provided by nomacs features a semi-transparent widgets that display additional information such as thumbnails, metadata or histogram.
Blender
Blender is a free and open-source 3D model software released under the GNU General Public License. The software can be used for 3D modeling, 3D animation, UV unwrapping, texturing, rigging, skinning, rendering, particle generation, water simulation and much more.
Photopea
Photopea is an advanced image editor Free online editor supporting PSD, XCF, Sketch, XD and CDR formats. Including Adobe Photoshop, GIMP, Sketch App, Adobe XD, CorelDRAW. With Photopea you can create new images or open existing files from your computer.
Glimpse
Glimpse is an open source image editor based on the GNU Image Manipulation Program (GIMP) 2.10.18. The goal of Glimpse is to experiment with new ideas and expand the use of free/libre software. Glimpse brings a new name and logo, a cleaner UI, and fewer "easter eggs" make an already amazing open source software package feel more enterprise-ready.