PDFBinder is a free tool that allows you to merge multiple PDF documents into one. Simply click "add file" select the PDF documents you want to merge, and then click "Bind". That's it.
This is a great resource for schools and teachers that use PDF documents often. Sometimes you have different files, whether scans of paper documents, PDFs of websites or already created PDFs, that you want as one file.
Other PDF Resources:
Crocodoc - markup PDF files for free
Fill Any PDF form - fill out, sign and send forms
I Love PDF - merge or split PDF files
Lots of PDF resources - print, markup, convert and more
Go Paperless:
