I am looking for a Windows program that can:
- display 4 PDFs or more simultaneously in the same window (more than 4 would be even better) like in the image below (but ideally with filenames visible somewhere).
- update the PDF whenever the PDF is changed by another program (e.g. like Sumatra PDF does, but I don't want to tile a bunch of Sumatra windows myself).
If possible, free and works with Windows 7 SP1 x64 Ultimate.