While the tasks are basic, it is very useful to have a free program to merge, split, extract and rotate PDFs etc.

This software is very simple to use, it has a self explanatory and intuitive interface with a strong set of options to better organize my PDF files. The document manipulation functionalities is very vast, and for those only looking to merge and split files or extract, mix and rotate PDFs quickly, this tool comes in very handy. Another feature to remark about it is the fact that I can manipulate large size files very smoothly without crashes and lags

I think there are few PDF management software with as many functions as PDFsam Basic. You can mix, merge, extract and much more. It has an ordered interface with well-placed functions.