Open Source MinGW/MSYS2 Raster Graphics Software

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.

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+

Float-ditherer is a tool that converts images into pure 1-bit images using a user specified palette tailored to convert images,textures and sprites using a float-based sampling method and float matrix. The software is meant to be lightweight and for power-users

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 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