Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Slinky - Your slack links — organized!
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Obie.ai - Access knowledge quicker without leaving Slack
Twitter Bookmarks - Create shortcuts to your favorite users/tweets on Twitter