Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Toby - Better Than Bookmarks
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
Hugo - Hugo is a general-purpose website framework for generating static web pages.
Curler - Dead Simple Free Uptime Monitoring