Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Pocket - When you find something you want to view later, put it in Pocket.
Tagpacker - A free tool to quickly collect, organize, and share your favorite links.
Tettra - Tettra is a company wiki that helps teams manage and share organizational knowledge.
Pinboard - Pinboard is a personal archive for things you find online and don't want to forget.
Readit - The most feature-complete reddit client on Windows Phone and Windows 10.