This set of free custom shapes includes over 40 wave shapes with different sizes and angles. Combine them with some wavy text and you'll get a truly unique design. If you need to make curved lines, wavy lines, etc you can try this set of Photoshop shapes.

It is one of the best out there on this particular theme. Make Photoshop waves, wave lines in just a few second and they are all vector shapes so they can be resized.