Raindrop.io - All your articles, photos, video & content from web & apps in one place.
LinkAce - A selfhosted bookmark manager with advanced features.
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.
Bookmark Sidebar - Adds a toggleable sidebar with all your bookmarks at the edge of your browser window.
Diigo - Diigo is a powerful research tool and a knowledge-sharing community
Pinterest - Pinterest is a visual discovery tool that you can use to find ideas for all your projects and interests.