LinkCollector can import/export links from/to browsers, unite them and store in different files. Search of duplicates will help you to keep your collection of bookmarks clean and also the program can easily check up bookmarks on existence.
urlShop 3.0 is a excellent solution for internet shortcut management. It provides a wide range of functionality, aimed to give you full control over your favorites and bookmarks, whether you are a novice or an expert.