Excellent. Though a couple of mods

/bin/ps -axwwo command= | perl -pe '$_="" if ! /\.app\/Contents/ ; $_ 
+= m{([^/]+\.app)/} ? "$1\n" : ""'
[download]

The expression order needs to be swapped as the previous order stripped off the /Contents before it can be matched by the second expression. Also a space after the '!' prevents tcsh trying to history-expand the search... Thanks