Selteco Menu Maker - description from Softdepia.com:
New in version 3.0: "Fixed" menu. Relative menus appear on the screen according to current html flow, wherever included using "script" tag. Fixed menu is independent of the html flow, and needs x and y position, menu width and height specified by the user. Unlike relative menu, fixed menu is compatible with browsers other than Internet Explorer. To specify fixed menu properties choose appropriate command from "Menu" menu.
Selteco Menu Maker is a "Free to try" program. You can download and try it for an evaluation period.