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.

Firefox Sync - Bring your Firefox bookmarks, tabs, or passwords wherever you go with Firefox Sync. Share between computers and mobile devices. Get Firefox now!

Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.

Diigo - Diigo is a powerful research tool and a knowledge-sharing community

Tagpacker - A free tool to quickly collect, organize, and share your favorite links.