Version 7.x-1.x-dev is a starting point... It is not complete, although it shows you a functional Management menu as a dropdown. More to come as time allows... See issue [#791664] for more info.
Version 6.x-1.13 fixes the vertical menu problem which had to do with CSS caching getting lost.
Version 6.x-1.10 to 6.x-1.12 fixes the non-called theme() function versus the other sub-modules that have callbacks through the theme() calls. However, we really need to have callbacks instead. Added horizontal and vertical themes. Attempts to fix to the vertical menu problem (because the CSS file could be deleted and not regenerated.)
Version 6.x-1.9 fixes the non-working cache when private file folder is in use. Added a new theme: blackblue.
Version 6.x-1.8 fixes a couple of problems with themes (re-)introduced by calling the theme() function in the hook_init() function. This was solved by re-writing the menu output generator. There is a switch flag in the global settings so you can choose one method or the other.
Version 6.x-1.6/1.7 include the latest fixes and should work really good for most. I should not have much changes to this version for a while (there are still some enhancements I'd like to make though.) If you have problems, don't hesitate to post issues.
Version 6.x-1.5 includes new features and bug fixes (or a new feature to help handle a bug such as the z-index textfield.) Some of the new features: (1) possibility to stick the menu at the top of the screen without it scrolling; (2) dynamically change the z-index parameter; (3) call drupal_alter() so other modules have a chance to modify the menu before it gets displayed; (4) multi-menu support; (5) inactive parent items; (6) separate module for Devel menu support.
Version 6.x-1.3/1.4 includes several fixes that were posted in the issue queue. (Note that 1.3 has a problem, some files are missing... they were not properly tagged. If you had 1.2 and just extract over 1.2 it will work, otherwise just get 1.4) If you have problems upgrading, please check this issue: [#801030]
Version 6.x-1.2 fixes an issue where the theme exclusions don't work, and subsequently can cause problems with displaying or not displaying the menu on certain paths.
Version 6.x-1.1 fixes compatibility problems with Zen theme, fixes an issue with the Black and Blue theme when using Garland and adds a setting to disable the menu on specified paths. More importantly, there is a fix for a bug that made it impossible to administer blocks for non-default themes.