Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Linker - Cloud based bookmark manager
Hugo - Hugo is a general-purpose website framework for generating static web pages.
BookMap - Drastically decrease the time taken to organise bookmarks 📎
BrainyTab - Bookmark manager that makes you smart(er)