I want to put a feature on my website where you can create your own jewelry, shoes, and handbags. I see lots of website that have this feature. Usually you can chose a blank bag and choose from different colors and when you click on the color the bag changes to that color and so on. Where can I find software that does this?

I'd be willing to bet that most of them use Flash.

I guess that for such applications there is no out-of-the-box solution, these are individual software developments based upon specific client requirements. I also would consider Flash being the choice for such applications; anyway there is surely also a way using JavaScript/Ajax technology and a server-side software (CGI script in Perl or PHP).

This is a highly specialized item, there is no set program to easily create this. You would need to contact a designer on this. Flash is a possibility, but it does depend on how many items and how many options. It can be done several ways, depending on complexity.