1)   LinkCollector Portable Edition 1.0
LinkCollector Portable Edition is a bookmark manager that supports all major browsers, such as Firefox, Opera, IExplorer. The program allows you to synchronize bookmarks between different browsers and computers and it can be stored on a USB disk.

 2)   LinkCollector 2.2
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.