With a little basic HTML you can create a page with multiple columns of links/bookmarks. Granted adding more bookmarks isn't as strait forward as what the small world icon to the right of the address bar does but you don't have the formating freedom HTML will give you.

FYI: you can also create bookmarks for files in your N8x0 that will give you visibility not available with the File Manger or Open functions of your applications. "file:///home/user" will show you the "native" Linux file names and let you see the hidden configuration files not available to the GUI.