Linkman - Linkman Pro allows for managing large amount of URLs in its own database.
LinkLocker - LinkLocker is a lightweight bookmarking service with an emphasis on privacy.
LinkStash - LinkStash is an outstanding bookmarks/favorites manager that works with Internet Explorer, Firefox...
Firefox Sync - Bring your Firefox bookmarks, tabs, or passwords wherever you go with Firefox Sync. Share between computers and mobile devices. Get Firefox now!
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.
Quicklinkr - Organize & Share your favorite links. Discover & Save new ones.