Bookling - Track your reading habits and set goals
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Literal - Track your reading and discover your next favourite book
Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Reading List - Reading List is a read-it-later app by Microsoft, which is bundled in Windows 8.1 onwards.
Freezetab - A powerful alternative to bookmarks.