Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Linkpack - Save, read and share your links
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.
Pegao | Save your links - Save your links, it's free and social
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.