Raindrop.io - All your articles, photos, video & content from web & apps in one place.

Memex - Instantly find websites again - but without organising them.

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.

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

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