i just found and tried this pdf tool today after being tired of multi-page pdf scans with half the images upside down. this tool, pdf fill (or pdfill) will allow u to rotate certain pages in the mix without affecting the others, and there's no watermarking or annoying popups, and no need to fill out emails to download. it does a lot more too. so far i love it. (this website has a lot of other cool pdf stuff to grab as well).
http://www.pdfill.com/pdf_tools_free.html
http://www.pdfill.com/pdf_tools_free.html