I have to connect several PDFs I've authored together in free tools. For example, one PDF could be a compiled LyX document and another could be scanned result.
I'm looking for a free tool that would easily allow me to do that.
- Free to use (bonus points for open source).
- Simple to use, and to show other people to use.
- Command line is fine, but UI is nicer.
- Has to run on windows.
- Has to be really straightforward to use.
- Has to produce valid PDF files.