Pipe menus are dynamic menus, built on-the-fly from scripts in OpenBox. These are referred to as "Pipe menus" since the script's output is piped back to Openbox and used for the menu. There are a number of pipe menus written by various people available through the Pipe menus page.
Opera bookmarks pipemenu for OpenBox
I have created a pipemenu for OpenBox allowing you to have a menu of your Opera bookmarks anywhere in the OpenBox window manager. When you click a bookmark in the menu it is opened in Opera or if Opera is already running in a new tab. To read more about OpenBox pipemenus and how to use them visit the OpenBox wiki.

