I really don’t like working with PDF files. They have silly DRM that interferes with your ability to copy and paste, they crash browser, they can be huge if incorrectly generated, they are generally not accessible to people who need to use special software like screen readers, sometimes you can’t search them…in short, they usually suck. Unfortunately, sometimes you have no choice but to deal with them. Most of the time, PDFs are a read-only affair if you don’t shell out for Adobe Acrobat (another reason why they suck). But if you ever need to merge several PDFs into one, or split a PDF file into several files, PDF Split and Merge is a free, open-source utility for doing just that. The interface is Java Swing and can be a bit hard to figure out at first, but it works like a charm. It will make you stop hating PDFs, for a moment at least.