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.
LinkAce - A selfhosted bookmark manager with advanced features.
QuickStart - Bookmark-based browser start page
GGather - Effortless and organized way to store and share your bookmarks with the right mix of features.
Linker - Cloud based bookmark manager