Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
BookmarkSheet - Your bookmarks in Google Sheets
Freezetab - A powerful alternative to bookmarks.
Annotate.tv - Optimize your learning on YouTube
Pocket - When you find something you want to view later, put it in Pocket.