Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Hyperping - Cheap uptime and performance monitoring with detailed reporting and flexible alerting
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
Robodash - Cron and uptime monitoring dashboard
Siimpl Bookmarking - Start collecting and organizing what interests you
UptimeRobot App - Web, SSL, ports & Cron-jobs monitoring