Swiss army knife of image processing
GraphicsMagick provides a set of commandline tools and programming APIs for manipulating, editing, and converting raster and vector images. It is derived from ImageMagick, with the objective of providing better stability and performance than ImageMagick while retaining the original MIT/X11 license.
Standalone software for photo editing and digital painting.
NOTE: Source code is no longer available. GeniuX® Photo EFX is a standalone software for photo editing and digital painting, powerful and easy to use. It can load RAW files of reflex digital cameras and is fully compatible with Adobe Photoshop. The previous version of this software counts more than 800.000 entries on Google search engine and is officially approved on Adobe Inc marketplace. Completely designed and produced in Italy, GeniuX® Photo EFX stands out for its 32 bit color graphic engine: it assures refined digital color gradations which allows to obtain bright prints of the highest quality, especially for skin color handling. The interface is conceived to highlight the most popular tools, for example black and white management, professional color processing, noise removal, photomontage and background removal.
Rendera is an open-source painting package.
Rendera is an open-source painting package. It is useful for useful for photo-retouching, seamless tile production, and other painting tasks. Currently being rewritten from scratch using C++/FLTK to support more platforms and work better.
A simple photo editing and printing program. Common photo editing features and image file formats are supported. Layers and pixel editing are not supported. Version 0.90 and later includes manageImages, a photo archive manager. Versions are now available for both Linux and Windows.
4 plugins for 360 panorama editing
GIMP Plug-In set for 360° panoramas =================================== This plugin set contain 4 plugins helpful in 360° equirectangular panorama creation: * fill_zenith_nadir - fills transparent areas on the top and the bottom of the generated panorama with a gradient that smoothly connects to the neighbour pixels * panorama_to_zenith_nadir - converts panorama to editable form of zenith and nadir areas. This allows for easy editing, eg. patching, filling, placing a logo * zenith_nadir_to_panorama - converts back the editable zenith and nadir to panorama projection * set_google_plus_metadata - attach metadata needed to publish panorama on Google+
ArahPaint4 - program for drawing images in repeat mainly intended for textile design (jacquard) - supports different X:Y aspect ratio - layers - unlimited undo - works fast with large images - seamless drawing in repeat - advanced textile filters - integrated image browser
A 3D equirectangular panorama viewer, in C/GTK+
Development has moved to github
Purple Koala is a free and open source cross-platform simple drawing and painting software. Part of Purple Animation Tools by O. Bahri Gordebak (purplehuman). See Wiki for details. Note that Sourceforge project page doesn't always show the latest download. Please click Files above and browse files before download. Latest version is 1.5 right now.
A photo editor and image processing software that provides real professional photo lab effects like smoothing and color filters, adaptive photo enhancement (adaptive sharpness and contrast). Based on C++ using wxWidget makes available for various OS (Lin