Ian Main has some nice looking CSS menus up for grabs.
Anthony Eggart has a nifty CSS only branching menu available for your downloading pleasure.
CSS Menu Maker allows you to customize the code for output.
Here’s a bunch of CSS Menus links too.
Interested in dropdown/branching menus for your WordPress template? Try out this bit of code for your main navigation, along with some of the above CSS designs.
List Page by Page Order
< ?php wp_list_pages('title_li='); ?>
You can also use ’sort_column=post_title’ to list your pages alphabetically, whereas menu_order will list your pages according to their ID number.
Exclude Pages From List
< ?php wp_list_pages('exclude=17,38' ); ?>
For more ways to control the output of your pages, check out the wp_list_pages in the codex.