Pocket - When you find something you want to view later, put it in Pocket.
Slack News Feed - Get the top posts from every Slack chat you're in.
Keep Everything - Light & Fast Web Archiver for iOS, OS X.
Slinky - Your slack links — organized!
Taggy - App for fast saving anything without losing focus
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.