SimpleViewer and Lightbox JS are two great resources that can help take your portfolio to the next level by improving the way your work is showcased.
SimpleViewer is a free, customizable Flash photo gallery application that is great for displaying your portfolio pieces. its high customizable and can can be changed to fit your design tastes perfectly. its easy to install, easy to use and can really give your portfolio a nice touch.
Lightbox JS is a simple script used to overlay images on the current page. Its very easy to set up and is compatible with most modern browsers. Although it is not a full flash gallery like SimpleViewer, it is sitll a great way to display your work once a thumbnail has been clicked. When you click an image it opens up the full image with a grayed out background and neutral image border. You can also add a caption to the image to provide viewers with detailed project info.