Stet.io - Stet.io is a high-quality pixel management platform that allows editing the pictures with online commands or multiple options with real-time effects or filters.
showFoto - ShowFoto is the standalone image editor of the digiKam project.
AliveColors - AliveColors is comprehensive graphics and photo editing software for Windows and Mac.
PhotoFlare - Quick, simple but powerful Cross Platform image editor.
ImageForge - - ImageForge Standard Freeware Edition:
PhotoDemon - Lightweight portable BSD licensed photo editor for Windows focused on performance and usability.