The application is very easy to use and the interface is very neat and comes with various skins so you could change the appearance . It has tabbed reading, measuring tools, auto-scrolling and gives you editing features like highlighting, hyperlink creation and commenting. The commenting feature is particularly useful when you are sharing documents with friends or colleagues and would like to communicate ideas. The Windows version provides features like, annotating, saving unfinished PDF forms, FDF import/export, converting to text, highlighting and drawing. If you're an advanced user you can access the application from the command line as well. Foxit also lets you view a PDF text-only and you get the watermark-free printing.
The application supports a large number of PDF-related features. You can easily organize your documents with the help of the layers and bookmarks, it also allows inserting comments and stamps.
Want to insert multimedia objects, such as audio & video ? No problem. If the document contains forms, it also allows filling them. Another useful feature is reading pages using the system’s text-to-speech engine. Sharing features of Foxit are also very cool. Above all it's free and the best OS alternative to Acrobat reader.