The software I was using to display the last couple of pictures last evening was Faststone Image Viewer from http://www.faststone.org/
I learned about it at a SWOPA meeting and I like the way it displays pictures. Last night was the first time I had played with the editing tools. For some quick maybe more extensive editing, I found it very useful and easy to use. Right click beside the picture and the options pop up. The directions are found on the page.
It is definitely not Photoshop but could be useful for some quick adjustments. It will even create a slide show.