BorderMania Pro and PhotoSwizzle plugins (for Windows)used to be pay-to-use..BUT have been made freeware now. BorderMania Pro 5 creates a variety of basic borders and buttons. 

 PhotoSwizzle 3 produces photocopy, button, drop shadow, kaleidoscope, prism, fractal and frame effects.

You can get it free now (or if u are feeling generous..make a small donation) 

http://www.pluginfilters.com/