Raindrop.io - All your articles, photos, video & content from web & apps in one place.
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.
start.me - A Modern-day bookmark manager. A place for your favorites. A news feed (RSS) reader. A browser startpage. A portal for your team.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.