From Sheep Systems:
Continuing on where other apps and services have left off, BookMacster merges and manages bookmarks in Safari, Firefox, Chrome, Camino, iCab, Opera and OmniWeb, and on the web with Delicious, Pinboard, and Google Bookmarks. When used with a file-syncing service in the cloud such as Dropbox or Jungle Disk, BookMacster takes cross-browser bookmark syncing on the road to any Mac. BookMacster keeps bookmarks alphabetized (sorted), verified, and checked for duplicates. BookMacster supports tags, comments, and shortcuts. BookMacster users can add bookmarks directly from within browsers, and access all bookmarks while in any app from the menu bar.
What's new in this version:
Version 1.3.1 makes it is easier to set up bookmarks syncing via The Cloud, adds support for XBEL so that users can migrate from older bookmarks management apps, and has other user-interface improvements and bug fixes.