At my work place, there are some people who ask for the full Adobe Acrobat product to edit PDF files. Of course, none of them realize how much it costs (if they even knew it wasn't a free product in the first place).
Fortunately, we don't need Adobe Acrobat, or even the free Adobe Reader to do most of what we need to do with PDF files.
I found three software that I've recommended to these people with much success.
Foxit PDF Reader
Foxit PDF Reader is one of the best free PDF reader. It replaces the official bloated and insecure Adobe Reader. You can even do some light editing with Foxit PDF Reader!
The free version is ad-supported. You have access to the Typewriter tool, sign PDFs, and add comments. You can also rotate the view, but it rotates for all pages. It also includes a virtual PDF printer so you can create PDF files simply by printing from an applications such as Internet Explorer or Microsoft Word.
As well rounded as Foxit PDF Reader sounds, it is missing the ability to delete and add pages. Rotating select multiple or single page is also notably missing.
Other than that, Foxit PDF Reader is probably the first PDF tool you'll want to install if you want to get away from Adobe.
PDF Rider picks up where Foxit PDF Reader left off. It acts like a browser and uses your default PDF viewer (in this case, Foxit PDF Reader if that's all you have) to open up PDF files. However, it adds the ability to manage the pages.
You can merge PDF documents, insert pages from another PDF file, extract pages from a PDF to a new PDF document, delete pages, rotate pages (select multiple and single), encrypt and decrypt PDF files, and "burst" a multi-page PDF document into individual single pages (separate PDF file for each page).
Simple, elegant, and free.
Foxit PDF Reader already have this covered, but if you prefer using the official Adobe Reader and still need to create PDF files by printing to a virtual printer, CutePDF has you covered.
CutePDF simply creates a virtual printer for you to print documents on. When you do so, it asks you to save your print job as a PDF file. That's it. Simple. It's free and there's no watermark that says "trial".
Those are my recommendations to people who ask. Do you have a favorite free PDF tool? Does it add more features or do the same job but better as my suggestions? Let me know in the comments!