Foxit Reader is a free light weight application for handling PDF documents. It is small in size, only 2.1 Mb and a rich feature set. The best part is that it is amazingly fast to load. Foxit Reader supports all Windows platforms like 98/Me/2000/XP/2003/Vista.
Now no more waiting periods to open pdf files through Adobe Acrobat reader, which was a pain when opening in Firefox Browsers. Its breezing fast speed will surely amuse you.
Another useful feature of Foxit is that it allows you to make annotations. i.e. now you can write notes or comments or highlight text on a PDF document very easily. It is further claimed that it is spyware free, while some other freely available pdf readers often connect to Internet to share your important data.