hmm if u want "most" important freeware cd burning tools (eg: u got zero dollar, no internet line, emergency times when u dont have any burning software) then i suggest using the built-in windows burning

. super easy to use. just right click ---> send to writer----> viola
if u want commercial freeware softwares, i think u can easily get burning tools cause it's usually bundled with your writer, unless you steal,rob,smuggle etc your writer then i suggest using CDBurnerX
http://cdburnerxp.se/