Bookmarker.me is a web-based bookmarking tool that lets you save and organize your favorite websites and webpages, making it easy to access them whenever you need.
GGather - Effortless and organized way to store and share your bookmarks with the right mix of features.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
LinkAce - A selfhosted bookmark manager with advanced features.
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.
Pinterest - Pinterest is a visual discovery tool that you can use to find ideas for all your projects and interests.