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 CS6 Extended tutorial showing how to use the 3D functions to create 3D text and place it in perspective in an ...

Photoshop CS6 Extended tutorial showing how to cast realistic shadows from any object including those with irregular bases.

To curve text in Canva, you'll need to use a workaround involving shape and text tools coupled with careful placement.