Bookmark OS - Bookmark OS is like Mac or Windows optimized for bookmarks.
Charity Engine - Charity Engine takes enormous, expensive computing jobs and chops them into 1000s of small pieces...
Raindrop.io - All your articles, photos, video & content from web & apps in one place.
BOINC - BOINC is an open-source software platform for computing using volunteered resources
Twitter Bookmarks - Create shortcuts to your favorite users/tweets on Twitter
Apache Mesos - Apache Mesos abstracts resources away from machines, enabling fault-tolerant and elastic distributed systems to easily be built and run effectively.