Function's at XSLT

hi all,
  How  can a get the last node of one sequence ? there is any function? or I
have to create a recursive one?
I have the fucntion last() but give the number , and I want the node..

Where can I find a fast guide with all function's that can possible used in
xslt ?

Thanks all

 XSL-List info and archive:  http://www.mulberrytech.com/xsl/xsl-list