The PDF Format is a great format not only for print but for any kind of documents and that for any platform. Adobe has its own reader which is bloated but rich with features and supports the newest features. There are many other readers and most of them are free or open source and they are faster but they tend not to have the newest features and some have problems with displaying transparencies and other things. A good resource for PDF readers is pdfreaders.org (@).

The reader I like to use is sumatra PDF reader (@), it’s fast and it’s small and can display every PDF and most of the newer features.