Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Barkr - Organise bookmarks into collections and then find your favourite websites quickly and easily, using an intuitive search rather than wading through masses of folders.
Linkman - Linkman Pro allows for managing large amount of URLs in its own database.
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
Pocket - When you find something you want to view later, put it in Pocket.
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.