I've been using Irfanview for several years now. It's simple and to the point. It's been around forever. You can very easily resize or crop your photos. Resize is under Image and crop is under edit. I'm not too sure how advanced you are but to crop a photo just left click your mouse over the photo and drag it over the part you want to safe to file.
It's a small program an it's free.
http://www.irfanview.com/