Everyone knows that Adobe gives away their Acrobat reader for free. This is a free alternative. Over the years Adobe Acrobat has grown to a 20 MB+ program that like to “call home” often and download 20MB updates. Due to its size, it also takes a long time to load.
Foxit PDF reader can read PDF files but is less than 2MB to install. Their uptdate files are also less than 1MB. Plus it loads in about 1/5 the time of Acrobat. If you need the high end features of forms building etc. then Foxit is not for you. But if you just need something quick and easy to read PDFs, then give Foxit a try.