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Sorax Reader is a Free PDF viewer. It has a small size, fast launch speed and a lot of features. There is no need for installation (it can be started directly from any kind of storage device - CD, PenDrive, etc.).
Major features
Small and starts immediately
Displays, prints PDF files
Zooms in and out, rotates displayed pages
Displays document bookmarks and page thumbnails.
Selects text on the viewed page, copies to clipboard
Searching in the document
Installation is not required
Supports PDF standard 1.7
Supports Eastern Asian Languages
Self upgrade

http://www.soraxsoft.com/products.html?0