The PEX Tube uncoiler is a great tool to help manage large rolls of tubing during your installation. The E6061000 works for rolls up to 1000 feet of 1/2" tubing (for large rolls of thicker tubing, you'll need the E6063000 model). It uses weighted arms to hold tubing in place while uncoiling and keeps tubing from tangling. It is easy to assemble and has a collapsible base.
These PEX uncoilers and other PEX tools are available at www.supplyhouse.com.