Photoshop has plenty of built-in shapes you can use.

Acutally, Custom Shapes came along beginning with Photoshop6.0.

Once you have installed Custom Shapes, you can easily create a copy of that shape with click and drag.

Here is my list of sites for you to download quality Photoshop custom shapes.

1. Ladyoak

High Quality Adobe Photoshop Shapes, Tips and Tutorials.

2. Foliage Shapes (Huge master set) | Dezignus.com

It is a huge foliage set of Photoshop shapes! A master set with a wide amount of elements for fashion foliage design. It contains all variety of foliage and flowers, leaves and greeneries, flourish twirls and swirly curls.

3. BioRUST.com

Plenty of creative Photoshop Shapes! Guests are free to view the content, but you need to register to download files.

4. Photoshop Custom Shapes | deviantART

deviantART Photoshop Custom Shapes page.

5. Custom shapes for Photoshop

Custom shapes for Photoshop ® CS3 CS2 CS 7 6 + Photoshop ® Elements PC + OS X

6. Free Photoshop – Free Photoshop Shapes and demos for download

All the shapes, brushes, etc. labeled as products from Graphicxtras can be used in many different commercial work, hobby and otherwise (other than the plugins which are in demo mode), they are still copyright of Graphicxtras 1996-2007, however, they are royalty free.

7. Free Photoshop Layer Styles and Shapes by Shelby Kate Schmitz | About.com

150 Ornate Shapes by Shelby Kate Schmitz