To get at the contents of a list:

uncons ( cons -- car cdr )

unswons ( cons -- cdr car )

lnth ( n list -- elt )

cadr ( list -- elt )

llength ( list -- n )

To get a new list from an old one:

lreverse ( list -- newlist )

lappend ( list1 list2 -- newlist )

lcut ( list index -- before after )