Save This! - "Save to Facebook" bookmarklet for any URL on the web.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Alfread - Actually read articles saved for later
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Readup - Track and improve your online reading habits.
Freezetab - A powerful alternative to bookmarks.