IrfanView - IrfanView ... one of the most popular viewers worldwide.
GIMP - GIMP is a multiplatform photo manipulation tool.
ImageGlass - You can use Image to view your digital images and photos of many different formats.
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
XnView MP - XnView is a free software that allows you to view, resize and edit your images. It supports more than 500 different formats!
Krita - Krita is a professional FREE and open source painting program. It is made by artists that want to seaffordable art tools for everyone. Concept art. texture and matte painters, illustrations and comics.