Does anyone have experience using this software? It's open source and looks like it would work well into Pressero workflows... http://www.imagemagick.org
ImageMagick has been around for awhile... it's a great tool. It's primarily meant for developers or power users. You could certainly use it for a post-pressero workflow, as it has a ton of options for working with images and PDF files. Just keep in mind you'll probably need to get someone with decent scripting skills to make it do what you want it to do.