XnView – Multi Format Image Viewer and Converter
XnView is a free image viewer and converter that provides you with a lot of tools for working with your digital pictures. It can quickly and easily, process and convert files. It supports almost 400 Graphics format. You can view your images and convert them quickly to around 50 popular graphics format.
The program uses a tree like structure to browse through your Album collection. You can even apply filters and effects to your images, resize-rotate them. It has a utility to take screenshots as well as a Batch Convert and Batch Rename utility. You can even use it to edit the IPTC data of an image. Besides this, it can be used to create web pages from images, contact sheets etc. Its compatibility with Adobe Photoshop plugins is a great feature.
All these features make it a perfect management tools for your digital pictures. You can even run it directly without installation. It works on all the version of Windows.