Firefox Sync - Bring your Firefox bookmarks, tabs, or passwords wherever you go with Firefox Sync. Share between computers and mobile devices. Get Firefox now!
BookMacster - Sync bookmarks between different browsers and cloud platforms such as dropbox and icloud
Linkman - Linkman Pro allows for managing large amount of URLs in its own database.
Pagemark - Private bookmark organizer with tags, thumbnails, and formatted notes
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
URL Manager Pro - URL Manager Pro for Mac OS, the most powerful bookmark manager for the Mac for use with Safari, Firefox and Chrome