I did the rotate (straighten horizon) in ACDSee, which has a nice "automatic crop" feature in the rotate. I enjoy using ACDSee for quick edits, and for viewing my photos. While it does not have the same quality or level of controls as other photo packages like Photoshop, I find it's quicker and more convenient for me to use (as my computer is a bit older / slower). So I use ACDSee for "quick edits". Other programs for the more "serious work".