In the past, you've had to download a huge PDF reader from another software company, go through a lengthy installation process and wait for an annoying splash window to disappear just to open a PDF document. Moreover, if you want to annotate a PDF document, you have to pay US$299 to buy certain software. Now with Foxit Reader, you don't have to endure such pain any more.
Foxit Reader itself is free. The critical add-ons are free while advanced add-ons have a reasonable cost.
You can use the following functions for free:
* View or print PDF document
* Basic PDF form operations i.e. filling out PDF forms and printing them out
* Advanced PDF form operations, such as saving filled-out forms and import/export forms, free for personal usage only
* View PDF as text
* Critical add-ons, such as UI language package, JPEG2000/JBIG decoder, CJK package, GDI+ for early Windows version, etc.
Acrobat Distiller 
Adobe Photoshop 
CardScan 
Selfish Net 
iVMS 4200 
uPLAY by Ubisoft 
Hard Time
Uinsin42
Excellent!
Kiril
Small and fast. Easy to use. Recommend.
Илья Пацев
Great software, and I loved it, but they changed the GUI and it is a major change. This made the experience worse for me personally. The way that highlighting worked before (ver 6) was perfect, and it was the most important single feature I use for my schoolwork. With version 7.1.5.425 I just want to roll back to version 6, or find alternative suite.