PhotoDemon - Lightweight portable BSD licensed photo editor for Windows focused on performance and usability.
Touchretouch - “…there's no easier way to remove unwanted items from your images.
PixBuilder - Free Photo Editing Software for PC
Pic Effects - Pic Effects is the perfect photo editing application for adding funny things to your photos.
PhotoFlare - Quick, simple but powerful Cross Platform image editor.
RetouchMe - RetouchMe is a complete photo editing application that allows the smartphone users to edit and retouch the selfies, body and facial parts.