SuperSorter - Clean up your bookmark mess!
Linkman - Linkman Pro allows for managing large amount of URLs in its own database.
Bookmarks Clean Up - Find and remove duplicated bookmarks manually and in batches, get rid of broken bookmark links and empty folders.
Rons WebLynx - Rons WebLynx is a powerful windows desktop bookmark manager to organize large numbers of websites links. Store bookmarks in folders, tag, edit, rate and much more.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.