PDF software to read many documents side-by-side in iPad?

This thread is a part of the major thread about using iPad for education purposes here.

When I do my homework, I often need to recap lecture notes and at the same time do assignments. Before my printer broke, I printed everything -- now with my iPad, I use only the screen. The problem is that I have only one iPad and so I am looking for a software using which I could read many PDFs at the same time. Does such a PDF reader exist?

I have used PDF Expert but it lacks this feature. I have also tried apps such as iAnnotate but cannot find this feature.

Solution 1:

Side by Side allows you to read up to 4 different PDFs side by side on an iPad.

Solution 2:

Try Easy Annotate, it allows showing and annotating two PDFs next to each other.

According to the website" "The only app that can annotate PDFs side-by-side"

They have a dropbox option which I use myself.