Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Ghostnote - Add notes to anything.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Context Note - Context Note is a free chrome extension that help you take notes on the web with their context.
Superdense - No text, just icons.
Page Pad - Page Pad is a productivity tool for creating notes on any particular web page you visit.