Page Curl Pro is a fairly old plugin that has been used for years. It works as a plugin for PaintShop Pro, just like for Photoshop or a few other programs. It allows you to create folds and curls on a source image to achieve some very interesting results. Of course, you could do all that manually with your PaintShop Pro, but sometimes, it could be nice to have a faster and more precise way to get the same result.