Pixlr - Pixlr® makes it easy to transform everyday images into stunning works of art.
digiKam - Professional Photo Management with the Power of Open Source
Photoscape - high quality photo editing software, that enables you to fix and enhance photos.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Adobe Photoshop Express - Easily edit and share your photos in no time!
FastStone Image Viewer - FastStone Image Viewer is a fast, stable, user-friendly image browser, converter and editor.