Stache - Stache makes it quick and easy to collect and re-discover pages you find useful, interesting or inspiring, in a beautiful, visual and fully searchable library.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
PutCut - PutCut is a social bookmarking tool for saving 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.
Pocket - When you find something you want to view later, put it in Pocket.
Kifi - bookmarks made social