Photoshop offers a wealth of tools for cropping images. You can crop to an aspect ratio, use content-aware fill and many other techniques.

Photoshop CC tutorial showing how to use the Shadows/Highlights feature, the Perspective Crop Tool and how to save images without their backgrounds by saving them as PNGs. Shadows/Highlights photo: <a ...

To manually crop a picture in Microsoft Word, Excel, or PowerPoint, select it, and in the Picture Format tab on the ribbon, click the top half of the split "Crop" button.

You can rotate a picture on your iPhone by 90 degrees or at a custom angle. Here's how to do it in a few simple steps.