Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Calendify - Calendify is an event community where you can share, publish, and subscribe to event calendars. It helps you to stay informed about what you are interested in and what is yet to come.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Upcoming.org - A simple way to share and discover interesting events
Linker - Cloud based bookmark manager
Colloq.io - Discover a new way to the conferences you like.